I work late nights in front of my computer, and very often I'll be having tea as I work. I find that if I have coffee the energy comes in too quickly and I get jittery, and very quickly it goes away. Tea helps me keep focused for the several hours I work for.
I thought the quality of this video was good, until the moment he recorded himself on a scooter with a passenger while keeping himself in the shot the whole time. Amazing! This guy is an entire research team and camera crew!
Filming yourself for a detailed educational video during a motorcycle ride in an exotic location with a lady behind you is the absolute pinnacle of badassery. James Bond transformation complete
Let me tell you,first of all your channel is one of them that made me get more intrested in tea ,now I'm drinking quality tea on regular basis. Now about caffeine, I noticed that I'm not only sleep better,even having cup of oolong at 8 pm ,than.ever before,I'm calmer and I just feel better,my digestion and lbs symptoms improved. Thank you.
Wow the quality of the video is insane, information is clear and concise. Love it, it really helps educate the masses. You are doing a great service to the tea community!
Across the world, we are replacing tea with coffee because of heavy marketing and proliferation of "café". Let's hope we return to tea and the beautiful tea rooms in near future with this wisdom!
Hi,please Confess Jesus As Lord with your mouth And Believe He Died For our sins And God Rose Him From The Dead,turn away from swearing, using God's Name in vain, making someone else sin, decieving, Praying to statues,Mary,Saints,Angels...,lying,over eating,magic,selfish ambitions, laziness, working On Saturdays(starting friday night by our time)pride,lust,hate,gossip,cigars,drugs,video games,movies,anime,idolatry(obssesions,un healthy connections to something,someone,addictions..) and that kind of stuff,Dedicate yourself To God Fully,Obey Him And Trust In Him And Jesus.
One reason why people think caffeine is so bad is energy drinks. About half of them in the US have 300+mg per can. I work with people who drink 4 or 5 cans a day and complain about high blood pressure and heart palpitations. On top of that, it's not a naturally occurring caffeine so your body can't process it as well.
Oh thank god. I knew that green/white tea myth could not possibly be true. Logically it just made no sense, yet I saw it everywhere! My mind is now at ease.
Always on a cheerful note. I started a business because I watch these vids. Thank you Don. A successful tea business for 7 years now because of your knowledge and inspiration. Cheers
Love. this. so. much. Don ! A study I read a while ago suggested the shorter you steep tea, the more caffeine you would get. Source was legit but common sense and cultural traditions were pointing the other way. Where do you stand on this ? Any sources ?
Hey Alex, This does not make any sense. Given the same variables (amount of tea, water, temperature) a longer brew will extract more caffeine. I have not seen any study comparing the amount of caffeine from a 5 min brew vs 20x 15 second brews. Maybe this is their meaning? BTW I am up for that collab if you want to explore then please email!
I think it related to the fact of the tannins binding caffeine. If you brew longer you get more tannins taking off the caffeine effect, but you also get more caffeine on the other side.
I really appreciated this information. I cut out caffeinated drinks because they caused my blood pressure to spike and migraines. I noticed this effect when drinking coffee (robusta mostly). After cutting caffeine out, my blood pressure returned to normal. I am encouraged to think that it is safe to reintroduce small amounts of tea from time to time without having to worry about an adverse reaction. Thank you.
FINALLY ONE MAN WHO USES SCIENTIFIC PUBBLICATIONS to talk about science!!! Thanks man, thank you so much. This channel is 100% legit and this is the video I was looking for to answer a lot of questions I have!
Greetings from Rhode Island USA. Thank you for the In depth info. I switched from black coffee to loose leaf black tea three years ago. Done some research but it's so much easier to have someone else do it.😁 Much appreciated.
This is an excellent video... Thank you. These years of Covid I have discovered many things which otherwise may have gone unnoticed or certainly unappreciated as a valuable part of lifestyle. Covid has given me the time to deep dive into Tea, Cigars, Wine, Whiskey... What a time to be alive..!
Good that tou mentionned kukicha cause Thats a really good Tea and its really cheap according to its quality.So I want people to try that. Hujicha (wich is often are made of kukicha) is another excellent evening Tea! Its good to inform people about this because a lot of people get the wrong information as you mentioned about the amount of coffein in black,green etc. We Have Made it too easy for us in the west!
Just placed my first order all the way from Casper, Wyoming! I'm so excited to see what your teas are like compared to what I am used to finding locally! Thank you for all of the information on your channel, you've inspired me to make tea I actually enjoy drinking.
@@jdubdoubleu Their tea is truly amazing... I've looked for some that I could order here in the U.S. since then and I always end up back at meileaf... I am currently drinking some of their guangxi silver needle... I'm not going to try and describe flavors because I don't have as developed palette as most and I wouldn't want to mislead you, but their tea is very delicious and to me it is worth the premium price... if you're on the fence order one of their flight boxes... they're reasonably priced and you get an assortment of tea. It's a great entry point to decide what best suits your taste too!
Anything with caffeine gives me anxiety......drives me crazy. Excellent video!! For years everyone would tell me no caffeine in tea. But, I'd keep trying different teas an most of time I'd feel it. Other times not so much.....I thought it was me. Great information!
Great video like always! I'd love to see you guys do a blind taste comparison with different sources of water on the same tea, such as tap vs. spring vs. filtered vs. distilled vs. bottled, etc. I've heard a lot about how important the kind of water is with tea brewing, so I'd love to see what you guys could conclude about what it does to the taste.
Fain I would really like to see that too! I live in Texas, and we have abundant hard water! Curious to know if I should be doing tap water or bottled. Or what effects the hard water could have on my teaware.
Hey Don! Great stuff here! I fell in love with tea many years ago and actually worked in the industry for a few years. This video hits home because the passion that I have for tea (which you understand for sure) is coupled with a caffeine sensitivity which, if I'm drinking tea, must be consumed in small amounts (half cup or less) at specific times of day (roughly 7am and 2pm). If I stray from this routine I will encounter headaches and moodiness. I've been on and off tea for the last 10 years and have always been trying to figure out how to continue my love of tea without the adverse affects of caffeine. BTW your videos are fantastic!
Hey Don, just started watching your videos and really enjoy them! Thanks for all the information. I don't know if anyone else has mentioned this but just wanted to share: roasting coffee does impact the caffeine, light roasts are higher caffeine and dark roasts have a lot of the caffeine removed in the roasting process (source: husband works at a coffee roasting facility). Now I'm off to watch more of your videos!
Incredible video Don! I've learned a lot from this one :) I've got a suggestion for another educational topic I'd love for you to cover - Taking an in-depth look into the visual cues of the dry+wet leaves. Ex: how to visually distinguish between buds and 2nd/3rd leaves, determining oxidation level, processing method and so on... Thanks Again!
Excellent Video! Just getting serious about tea thanks to you Don. I have a sensitivity to caffeine so it is very helpful to understand the levels of caffeine in different teas from the roast to the time of harvest. Your video dispelled many preconceived notions about caffeine and tea. Thanks so much!
Thank you Don! Excellent presentation that confirms and expands my understanding of the subject; like your experience, a question that recurs in every one of my tea sessions. Hoping to visit your tearoom next visit to UK.
Awesome! You have my gratitude for this video. There is also a nice tea called Lao Cha Gu ("old tea bones") which is puehr prepared from sticks but not from leaves - perfect choice for those caffeine-sensitive who love shou puehr
So far for me different types of tea and farmers and batches have been similar to Cannabis strains. Some can cause panic or anxiety, some are too heavy, and some are just splendidly useful. Great video!
Thank you for debunking the diuretic myth. This has always worried me. And for all the other amazing information. Your style is beautiful and clear and I thoroughly enjoyed this video. Love from Australia.
I believe it also has theanine. I've been drinking tea gong fu style daily for years. Once I decided to try Yerba Mate. I drank it in a gourd with a bombilla all day long. I did this for about a month. Initially I loved the taste and the way it made me feel. It gave me way more energy than tea and honestly I felt great.(at the time) But then I realized that the month had gone by in an instant. No joke. It's as if it literally sped up my life. So I went back to tea and life slowed down again. I am not a fan of Mate and I view it as an addictive drug almost. I felt great at the time but it really messed me up. Just my personal opinion and experience. It's probably worth noting I have extreme anxiety, some PTSD and depression when the PTSD kicks in. I take no pharmaceutical drugs. Tea is the only medicine that I use. It calms me down when I need it and keeps me mentally strong. So I probably shouldnt have tried Mate to begin with.( if it ain't broke. Dont fix it.) Sorry for the long comment. I just wanted to share my experiences. Have a nice day.
Guayusa is an interesting alternative as well. Similar to mate, it has caffeine and is said to have theanine as well (I don't know if this has been confirmed). For me it has a much milder effect than mate. Doesn't taste as good as tea though!
GoneKiffen that's very interesting. I wonder if it's just the caffeine levels that weren't working for you, or if there's something else in mate that was responsible. The theanine content is pretty cool, and mate also has some theobromine (of chocolate fame). Not sure if guyasa does (seems to be much less researched), but that one is also a solid functional drink.
I'm very sensitive to caffeine, I have a rare heart disease and stay away from high caffeine drinks. I went to the hospital with just one cup of coffee accidentally brewed in the decaf pot where I was eating. Crazy as it sounds, my sensitivity increases without a small consumption of caffeine. So I drink tea. Some times it bothers me. But with your guidelines, the best I have ever seen. I now know why sometimes it bothers me. keep on reporting. I am now on the look out for some non-powdered teas of the oolong (spell?) type.
I’ve heard once from a chemist that caffein is actually water soluble at quite low temperatures, even near freezing - and that theoretically tea could be decaffeinated by first steeling in iced water.
Fantastic video, arguably one of your best so far (at least in my opinion). I really like these educational videos, hopefully we can see more of these in the future. All the best, Mei Leaf!
I just stumbled across your channel, trying to educate myself on tea. I learned that caffeine is a big contributor to my muscle pain and stomach trouble and there is so little written about it. Caffeine doesn't just affect your blood pressure and how awake you feel. Just to let you know...
You don't know that for sure, you can't just blame caffeine for muscle pain based on a little dabbling research. Stomach pain, yes.
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Quite accurate and comprehensive information. Not very long ago I did some research on regard to this issue and reached most of these same conclusions. I'd never heard of of the modulating effects of polyphenols nor the synergistic effect of caffeine and theanine, though. As a matter of fact, I hadn't even heard of theanine before.
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As for the alleged higher caffeine content with longer withering, you can't induce the production of any further caffeine once the tea leaves have been plucked and "killed" (conversely, you could theoretically denature or remove some of its caffeine content). Alternatively, you could increase the bioavailability of its caffeine content, so it would be more readily released into water when brewing the tea. But that's not what they usually measure in the lab when they compare different teas, but rather the maximum caffeine content they can extract by leaving the tea a much longer time in water. E.g., boiling water was poured on tea leaves and stirred for 10 minutes: agriculturejournals. cz/publicFiles/08057.pdf You could concentrate the caffeine content by partially degrading or removing some of the other components present in the tea leaves, such as water, which is one of the purposes of the withering process. But if at the end point of the process all tea varieties have the same water content, the greater water loss during a longer withering phase would be irrelevant. There are other components present in the tea leaves that are degraded during the withering phase. Apparently, chlorophyll begins to degrade, some of the carbohydrates are broken down for use as energy, and the polyphenol oxidase and peroxidase enzymes becomes active, as a result of those degradation processes, some of the volatile compounds dissipate (including CO2). A greater extent of degradation would render a higher caffeine concentration in the remaining dry matter (assuming the extent of caffeine degraded by such processes is negligible).
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+Mei Leaf, you failed to mention why caffeine is toxic to insect pests. Does caffeine also block the insects' adenosine receptors inducing in them jitters or anxiety?
I'm sufering from anxiety and panic disorder. so I surely can not drink coffee. and even black/green/ oolong tea can get me anxiety and panic attack. so I can only drink herbs tea and flowers tea. but apparently I have to be careful with rose bud tea. tried 3 small buds and steeped for 5 minutes in a cup of boiled water, and it went fine for me. but today I found out, 4 big buds + 1 cup boiled water, steeped 15 mins (+ 1 tsp honey later when it cooled down), and it got me anxiety and panic attack pretty bad. heart palpitation, disoriented, jittery, stomachache, and finally the most horrific is impending doom (as always). and I thank you I found your vid. this gave me quite clear explanation about caffeine. for I have read an article wrote rose buds still contain caffeine -but I didn't believe it-, now I do. 😌
The information that you impart is so helpful and interesting that I want to listen to ALL the videos that you have made. I am certainly becoming more knowledgeable with each subject about Tea but this segment about caffeine in tea was the most helpful of all.
Dear person reading this YOU are such a blessing to beyond a gazillion times and beyond that and beyond that and beyond that and beyond that and beyond that!😃
Great video. I just drink red tea/rooibos in the evenings so I can fall asleep. :) I know it's not actually tea, but it's a good alternative and it's delicious and naturally caffein free.
Thank you very much, Don! I have watched every episode (well, not sure if I memorize all the knowledge you have given). But thank you again and I hope to see you in two weeks in London if you have returned home.
excellent video. extremely well explained - good pacing. contains jargon - but its explained in simple language with context which helps to understand the ideas being shared. Thanks for the well structured video.
How about caffeine in cold brewed japanese green tea? The cold water should not extraxt too much but with a 12h fridge brew I feel very tea-lifted! 🙌 🍵
You keep showing up on my feed and I have to admit as someone who is really into tea I enjoy your videos. You deserve a lot more views for the quality videos you share. You've earned my subscribe. (one thing that bothers me and I'm just stating my opinion in a positive way, sometimes you move your hands a little too much.)
OMG! Such an informative video, simply great. I didn't even get distracted for a single minute while watching it. Only a tea lover can understand my feeling. Awesome work! Thanks. Have a little question ' does adding little milk to tea make it unhealthy? Please answer.
Amazing video! It went above and beyond what I was expecting from a vid talking about caffeine! There are many out there that unfortunately only offer shallow and/or approximate knowledge. Thank you for educating the tea community! Quick question, when you talk about a "cup" of tea, do you mean a traditional 8oz/235ml cup?
NICE!!!! You've really done your homework it seems: i am impressed. You take a scientific approach to everything you do, with good references, sound science and even nice little scientific experiments of your own: BRAVO!!!!
Found your tea videos today. Really enjoying them so far. Informative, detailed, with great science yet conveyed simple enough to understand. I like being able to dig deeper into my new hobby of tea with your videos. Keep up the great work.
Thank You for the great video & information! You were talking about tea versus coffee and dehydration, etc.… The question I have Is... tea hat is made into iced tea commercially, then bottled and bought in stores… As hydrating as if you were drinking your own Iced tea that you made at home?
I love your content, this was another great video. I'll add a personal comment. From my experience (and a study that I read), it's not just that "Higher Temperature = Higher Caffeine", but I believe it's "Higher Temperature = Caffeine Extracted Faster". A cold steeped tea can have a lot of caffeine too, it just takes a lot longer. I don't *believe* there is a threshold whereby a certain temperature is required to extract some of the caffeine; it's just a matter of speeding up the extraction. Of course, this does mean that if one isn't deliberately attempting to extract all of the caffeine from their leaves, over enough steep time or multiple steeps, that higher temperature will effectively mean higher caffeine. I could be wrong about this stuff though! Cheers.
Thank you very much ! New subscriber here. Pls answer my very basic query as a begginer tea drinker- if someone is making tea just for himself {not many ppl around to share} and want to try Gongfu method that you recommend, then my question is about the subsequent steeps- 1} how many times we can steep same leaves 2} Can same leaves be left in the pot to be used hours later eg.morning and then next steep evening. 3} Will caffeine content get reduced after each steep. Thanks in advance!☺️
I went wild on the new mei leaf order that came in. I just had too long of a session with too much leaf. Yep, made me anxious and some jitters. Going to get it out of my system; but for next time I will definitely reduce the leaf and less steep time. What's weird is it was fine after I was done with the session then it kind of creeped up on me a few hours later. I'll try very small next time.
Amazing video. Thank you for your unbiased information. Always explained so articulately and with great suggestions for reducing caffeine. You rock Don!
I would really like to see a video about, your 'video making' what cameras, microphones, mobile phone, selfie sticks, tripods, any software that you use. I suspect that many of your subscribers would be interested in this other geeky side. The results are very impressive. Thanks Don and Celine
Thanks for your cristalclear explanation. What are your thoughts about rinsing Pu-Erh for 10 sec at 100 degrees Celsius and than steep it the Western method for 4 minutes at 80 degrees Celsius? Will it decrease the cafeïne level and will the taste be as good as by steeping it at 100 degrees Celsius?
Give this man a contract with the BBC.
Well done comment mate.
F the BBC, make it a netflix Show!
@@BB-hc9jj even better.
@@bradyoung8415 Exactly! I could listen to Don Mei all day! Have done, in fact!
+
I work late nights in front of my computer, and very often I'll be having tea as I work.
I find that if I have coffee the energy comes in too quickly and I get jittery, and very quickly it goes away. Tea helps me keep focused for the several hours I work for.
if tea drinking makes people as happy as you,, the world must drink tea!!! love your videos..
This is easily your most visually interesting and well edited informational video to date!
Well said. The island tour made this really fun to watch.
If only we could be on an island every week!
This was a great breakdown with interesting visuals. Thanks.
I thought the quality of this video was good, until the moment he recorded himself on a scooter with a passenger while keeping himself in the shot the whole time. Amazing! This guy is an entire research team and camera crew!
Filming yourself for a detailed educational video during a motorcycle ride in an exotic location with a lady behind you is the absolute pinnacle of badassery. James Bond transformation complete
I was a bit anxious for him.
Let me tell you,first of all your channel is one of them that made me get more intrested in tea ,now I'm drinking quality tea on regular basis.
Now about caffeine, I noticed that I'm not only sleep better,even having cup of oolong at 8 pm ,than.ever before,I'm calmer and I just feel better,my digestion and lbs symptoms improved.
Thank you.
Wow the quality of the video is insane, information is clear and concise. Love it, it really helps educate the masses. You are doing a great service to the tea community!
Thank you!
@@MeiLeaf also i was amazed by how you filtered out the sound of wind during the motorbike scene
How can he pull off presenting all that information while driving a motorbike?
All I ever wanted to know about caffeine in tea in 16 minutes... Just perfect
Across the world, we are replacing tea with coffee because of heavy marketing and proliferation of "café". Let's hope we return to tea and the beautiful tea rooms in near future with this wisdom!
I'm a bit obsessed with these videos. Maybe very obsessed.
;) we like obsessive people so cheers for watching
Don't start watching Tea house ghost or you'll have two channels to obsess on
Haha it is a pandemic tea virus xd
They’re such a good resource and nice to watch
Hi,please Confess Jesus As Lord with your mouth And Believe He Died For our sins And God Rose Him From The Dead,turn away from swearing, using God's Name in vain, making someone else sin, decieving, Praying to statues,Mary,Saints,Angels...,lying,over eating,magic,selfish ambitions, laziness, working On Saturdays(starting friday night by our time)pride,lust,hate,gossip,cigars,drugs,video games,movies,anime,idolatry(obssesions,un healthy connections to something,someone,addictions..) and that kind of stuff,Dedicate yourself To God Fully,Obey Him And Trust In Him And Jesus.
One reason why people think caffeine is so bad is energy drinks. About half of them in the US have 300+mg per can. I work with people who drink 4 or 5 cans a day and complain about high blood pressure and heart palpitations. On top of that, it's not a naturally occurring caffeine so your body can't process it as well.
Naturally occuring caffeine and the caffeine used in energy drink are chemically identical
Oh thank god. I knew that green/white tea myth could not possibly be true. Logically it just made no sense, yet I saw it everywhere! My mind is now at ease.
Always on a cheerful note. I started a business because I watch these vids. Thank you Don. A successful tea business for 7 years now because of your knowledge and inspiration. Cheers
Love. this. so. much. Don !
A study I read a while ago suggested the shorter you steep tea, the more caffeine you would get. Source was legit but common sense and cultural traditions were pointing the other way. Where do you stand on this ? Any sources ?
Hey Alex,
This does not make any sense. Given the same variables (amount of tea, water, temperature) a longer brew will extract more caffeine. I have not seen any study comparing the amount of caffeine from a 5 min brew vs 20x 15 second brews. Maybe this is their meaning?
BTW I am up for that collab if you want to explore then please email!
Ok. That's what I think anyway, and that's also what I can feel when I drink chitir' leftovers haha. ( 100% up to do something )
I sent a TH-cam private message :)
Mei Leaf I would love to have it too please!
Amazing video, really instructive thank you!
I think it related to the fact of the tannins binding caffeine. If you brew longer you get more tannins taking off the caffeine effect, but you also get more caffeine on the other side.
I really appreciated this information. I cut out caffeinated drinks because they caused my blood pressure to spike and migraines. I noticed this effect when drinking coffee (robusta mostly). After cutting caffeine out, my blood pressure returned to normal. I am encouraged to think that it is safe to reintroduce small amounts of tea from time to time without having to worry about an adverse reaction. Thank you.
@@Lisa-jo1cd right but 25g is different from 150g
I'm a long-time tea fan and know quite a bit to begin with, but now that I've gotten a job in a tea shop I decided to up my tea knowledge game.
FINALLY ONE MAN WHO USES SCIENTIFIC PUBBLICATIONS to talk about science!!!
Thanks man, thank you so much. This channel is 100% legit and this is the video I was looking for to answer a lot of questions I have!
THIS IS WHAT THE WORLD NEEDS
Greetings from Rhode Island USA. Thank you for the In depth info. I switched from black coffee to loose leaf black tea three years ago. Done some research but it's so much easier to have someone else do it.😁 Much appreciated.
This was absolutely brilliant! I am caffeine sensitive, but I love tea SO MUCH! This is exactly what I needed to hear! Cheers from Texas
This is an excellent video... Thank you. These years of Covid I have discovered many things which otherwise may have gone unnoticed or certainly unappreciated as a valuable part of lifestyle. Covid has given me the time to deep dive into Tea, Cigars, Wine, Whiskey...
What a time to be alive..!
Good that tou mentionned kukicha cause Thats a really good Tea and its really cheap according to its quality.So I want people to try that.
Hujicha (wich is often are made of kukicha) is another excellent evening Tea! Its good to inform people about this because a lot of people get the wrong information as you mentioned about the amount of coffein in black,green etc. We Have Made it too easy for us in the west!
Just placed my first order all the way from Casper, Wyoming! I'm so excited to see what your teas are like compared to what I am used to finding locally! Thank you for all of the information on your channel, you've inspired me to make tea I actually enjoy drinking.
Well, how did it taste?
@@jdubdoubleu Their tea is truly amazing... I've looked for some that I could order here in the U.S. since then and I always end up back at meileaf... I am currently drinking some of their guangxi silver needle... I'm not going to try and describe flavors because I don't have as developed palette as most and I wouldn't want to mislead you, but their tea is very delicious and to me it is worth the premium price... if you're on the fence order one of their flight boxes... they're reasonably priced and you get an assortment of tea. It's a great entry point to decide what best suits your taste too!
Anything with caffeine gives me anxiety......drives me crazy. Excellent video!! For years everyone would tell me no caffeine in tea. But, I'd keep trying different teas an most of time I'd feel it. Other times not so much.....I thought it was me. Great information!
Great video like always! I'd love to see you guys do a blind taste comparison with different sources of water on the same tea, such as tap vs. spring vs. filtered vs. distilled vs. bottled, etc. I've heard a lot about how important the kind of water is with tea brewing, so I'd love to see what you guys could conclude about what it does to the taste.
Fain I would really like to see that too! I live in Texas, and we have abundant hard water! Curious to know if I should be doing tap water or bottled. Or what effects the hard water could have on my teaware.
Yes this one is incoming too!
Fain Agreed!
Explains a lot as to why I drink tea instead of coffee. Coffee makes me jittery, tea makes me pleasantly caffeinated. 🙂
Fantastic video, Don!
You deserve much more attention in the tea world out there!
Best wishes from Germany :-)
Hey Don! Great stuff here! I fell in love with tea many years ago and actually worked in the industry for a few years. This video hits home because the passion that I have for tea (which you understand for sure) is coupled with a caffeine sensitivity which, if I'm drinking tea, must be consumed in small amounts (half cup or less) at specific times of day (roughly 7am and 2pm). If I stray from this routine I will encounter headaches and moodiness. I've been on and off tea for the last 10 years and have always been trying to figure out how to continue my love of tea without the adverse affects of caffeine. BTW your videos are fantastic!
Love the moped point of view and drive-by explanation.
Thanks!
Thank you. 💚
Hey Don, just started watching your videos and really enjoy them! Thanks for all the information. I don't know if anyone else has mentioned this but just wanted to share: roasting coffee does impact the caffeine, light roasts are higher caffeine and dark roasts have a lot of the caffeine removed in the roasting process (source: husband works at a coffee roasting facility). Now I'm off to watch more of your videos!
Hi Don-thanks for this-I’m actually writing a book on caffeine and this video has been very helpful!
Great I am glad it was helpful! Let us know when the book is coming.
@@MeiLeaf Yes, sir-I'll be more than happy to send you a copy and see what you think :-)
Incredible video Don! I've learned a lot from this one :)
I've got a suggestion for another educational topic I'd love for you to cover -
Taking an in-depth look into the visual cues of the dry+wet leaves. Ex: how to visually distinguish between buds and 2nd/3rd leaves, determining oxidation level, processing method and so on... Thanks Again!
OK!
Fininally, after years of research, i found the information i have been looking for. Thank you😊
Excellent Video! Just getting serious about tea thanks to you Don. I have a sensitivity to caffeine so it is very helpful to understand the levels of caffeine in different teas from the roast to the time of harvest. Your video dispelled many preconceived notions about caffeine and tea. Thanks so much!
I'm so excited for this video! I recommended this video be made a few weeks ago!
Yep this one was yours!
Wow! It was so much more informative than I thought! Thank you so much!
A lot of information thrown at you but you asked for it so there you go!
Thank you Don! Excellent presentation that confirms and expands my understanding of the subject; like your experience, a question that recurs in every one of my tea sessions. Hoping to visit your tearoom next visit to UK.
A new word is needed for that moment of pleasure and relief when you stumble upon something satisfyingly good. :)
Awesome! You have my gratitude for this video. There is also a nice tea called Lao Cha Gu ("old tea bones") which is puehr prepared from sticks but not from leaves - perfect choice for those caffeine-sensitive who love shou puehr
So far for me different types of tea and farmers and batches have been similar to Cannabis strains. Some can cause panic or anxiety, some are too heavy, and some are just splendidly useful.
Great video!
Thank you for debunking the diuretic myth. This has always worried me. And for all the other amazing information. Your style is beautiful and clear and I thoroughly enjoyed this video. Love from Australia.
It's worth noting that yerba mate also contains caffeine (and plenty of it!), not "mateine" as is sometimes claimed. Great work as always Don & co!
I believe it also has theanine. I've been drinking tea gong fu style daily for years. Once I decided to try Yerba Mate. I drank it in a gourd with a bombilla all day long. I did this for about a month. Initially I loved the taste and the way it made me feel. It gave me way more energy than tea and honestly I felt great.(at the time) But then I realized that the month had gone by in an instant. No joke. It's as if it literally sped up my life. So I went back to tea and life slowed down again. I am not a fan of Mate and I view it as an addictive drug almost. I felt great at the time but it really messed me up. Just my personal opinion and experience. It's probably worth noting I have extreme anxiety, some PTSD and depression when the PTSD kicks in. I take no pharmaceutical drugs. Tea is the only medicine that I use. It calms me down when I need it and keeps me mentally strong. So I probably shouldnt have tried Mate to begin with.( if it ain't broke. Dont fix it.) Sorry for the long comment. I just wanted to share my experiences. Have a nice day.
Guayusa is an interesting alternative as well. Similar to mate, it has caffeine and is said to have theanine as well (I don't know if this has been confirmed). For me it has a much milder effect than mate. Doesn't taste as good as tea though!
GoneKiffen that's very interesting. I wonder if it's just the caffeine levels that weren't working for you, or if there's something else in mate that was responsible.
The theanine content is pretty cool, and mate also has some theobromine (of chocolate fame). Not sure if guyasa does (seems to be much less researched), but that one is also a solid functional drink.
I'm very sensitive to caffeine, I have a rare heart disease and stay away from high caffeine drinks. I went to the hospital with just one cup of coffee accidentally brewed in the decaf pot where I was eating. Crazy as it sounds, my sensitivity increases without a small consumption of caffeine. So I drink tea. Some times it bothers me. But with your guidelines, the best I have ever seen. I now know why sometimes it bothers me. keep on reporting. I am now on the look out for some non-powdered teas of the oolong (spell?) type.
First time in your channel,and I was amaze how you give us the complete details, speaks very clearly 👏 .
Thank you for adding references! Not only that but they are all reputable!! Definitley subscribing
Cheers George
really good work on supplying peer-reviewed references! as a biomedical scientist this makes me very happy :)
I just started drinking teas (other than basic brand-name teabags) and I am learning so much from you. Thank you so very much.
Cheers for watching
I’ve heard once from a chemist that caffein is actually water soluble at quite low temperatures, even near freezing - and that theoretically tea could be decaffeinated by first steeling in iced water.
Thanks for what you do ⛩
May Tea heal this earth and all be happy and well 🙏🏽
Fantastic video, arguably one of your best so far (at least in my opinion). I really like these educational videos, hopefully we can see more of these in the future. All the best, Mei Leaf!
I could just tell this would be quality content! Brilliant video
Your videos are phenomenal. I've been watching them all over the past few days. Props to you!! Keep it up! So well made!
I just stumbled across your channel, trying to educate myself on tea. I learned that caffeine is a big contributor to my muscle pain and stomach trouble and there is so little written about it. Caffeine doesn't just affect your blood pressure and how awake you feel. Just to let you know...
You don't know that for sure, you can't just blame caffeine for muscle pain based on a little dabbling research. Stomach pain, yes.
Quite accurate and comprehensive information. Not very long ago I did some research on regard to this issue and reached most of these same conclusions. I'd never heard of of the modulating effects of polyphenols nor the synergistic effect of caffeine and theanine, though. As a matter of fact, I hadn't even heard of theanine before.
As for the alleged higher caffeine content with longer withering, you can't induce the production of any further caffeine once the tea leaves have been plucked and "killed" (conversely, you could theoretically denature or remove some of its caffeine content). Alternatively, you could increase the bioavailability of its caffeine content, so it would be more readily released into water when brewing the tea.
But that's not what they usually measure in the lab when they compare different teas, but rather the maximum caffeine content they can extract by leaving the tea a much longer time in water. E.g., boiling water was poured on tea leaves and stirred for 10 minutes: agriculturejournals. cz/publicFiles/08057.pdf
You could concentrate the caffeine content by partially degrading or removing some of the other components present in the tea leaves, such as water, which is one of the purposes of the withering process. But if at the end point of the process all tea varieties have the same water content, the greater water loss during a longer withering phase would be irrelevant.
There are other components present in the tea leaves that are degraded during the withering phase. Apparently, chlorophyll begins to degrade, some of the carbohydrates are broken down for use as energy, and the polyphenol oxidase and peroxidase enzymes becomes active, as a result of those degradation processes, some of the volatile compounds dissipate (including CO2). A greater extent of degradation would render a higher caffeine concentration in the remaining dry matter (assuming the extent of caffeine degraded by such processes is negligible).
+Mei Leaf, you failed to mention why caffeine is toxic to insect pests. Does caffeine also block the insects' adenosine receptors inducing in them jitters or anxiety?
Finally a clear video, where everything is expressed in a proper way! Thank you for what you do, Don! Love your channel :)
I'm sufering from anxiety and panic disorder. so I surely can not drink coffee. and even black/green/ oolong tea can get me anxiety and panic attack. so I can only drink herbs tea and flowers tea. but apparently I have to be careful with rose bud tea. tried 3 small buds and steeped for 5 minutes in a cup of boiled water, and it went fine for me. but today I found out, 4 big buds + 1 cup boiled water, steeped 15 mins (+ 1 tsp honey later when it cooled down), and it got me anxiety and panic attack pretty bad. heart palpitation, disoriented, jittery, stomachache, and finally the most horrific is impending doom (as always). and I thank you I found your vid. this gave me quite clear explanation about caffeine. for I have read an article wrote rose buds still contain caffeine -but I didn't believe it-, now I do. 😌
The information that you impart is so helpful and interesting that I want to listen to ALL the videos that you have made. I am certainly becoming more knowledgeable with each subject about Tea but this segment about caffeine in tea was the most helpful of all.
Dear person reading this YOU are such a blessing to beyond a gazillion times and beyond that and beyond that and beyond that and beyond that and beyond that!😃
Great video.
I just drink red tea/rooibos in the evenings so I can fall asleep. :) I know it's not actually tea, but it's a good alternative and it's delicious and naturally caffein free.
Wow, this video is packed with information, very coherently delivered, and manages to be so visually pleasing as well! Really liked it :)
I use a low amount of leaf and a short brewing time. I like a lighter tea taste and I don't like a lot of caffeine. Thanks for this information.
Thank you very much, Don! I have watched every episode (well, not sure if I memorize all the knowledge you have given). But thank you again and I hope to see you in two weeks in London if you have returned home.
Thank you for including reference links! I look forward to going through them.
I had no idea thre is so much goes into tea production great video thank you
excellent video. extremely well explained - good pacing. contains jargon - but its explained in simple language with context which helps to understand the ideas being shared. Thanks for the well structured video.
I'm on a mission to watch all your videos and learn as much as possible.
Go Azman!
How about caffeine in cold brewed japanese green tea? The cold water should not extraxt too much but with a 12h fridge brew I feel very tea-lifted! 🙌 🍵
Can you please do a video on the health benefits and potential risks of drinking lots of tea? Thanks Mei Leaf for awesome videos!
Thank you for all the thorough work you do to provide us with compact information. It is
very much appreciated!
Amazing, extremely informative thank you so much I am diabetic needs this so much
This is an excellent video. Exactly what I wanted to know and with a great delivery. Thanks Don.
You keep showing up on my feed and I have to admit as someone who is really into tea I enjoy your videos. You deserve a lot more views for the quality videos you share. You've earned my subscribe.
(one thing that bothers me and I'm just stating my opinion in a positive way, sometimes you move your hands a little too much.)
matsdonder I agree! I never knew how much I move my hands until I started this channel! Thanks for subscribing.
Great stuff thanks for sharing!
OMG! Such an informative video, simply great. I didn't even get distracted for a single minute while watching it. Only a tea lover can understand my feeling. Awesome work! Thanks.
Have a little question ' does adding little milk to tea make it unhealthy? Please answer.
pooja bhandari hi pooja. It does not make the tea unhealthy but the casein inhibits some of the flavanols which have a antiox effect on the body.
Amazing video! It went above and beyond what I was expecting from a vid talking about caffeine! There are many out there that unfortunately only offer shallow and/or approximate knowledge. Thank you for educating the tea community! Quick question, when you talk about a "cup" of tea, do you mean a traditional 8oz/235ml cup?
Yes this is the approximate amount of caffeine in 250ml cup but I guess that it is a similar amount in a 100ml Gong Fu brewed cup.
Love your videos! You are charming and good natured, the videos are lively and informative!
NICE!!!! You've really done your homework it seems: i am impressed. You take a scientific approach to everything you do, with good references, sound science and even nice little scientific experiments of your own: BRAVO!!!!
Found your tea videos today. Really enjoying them so far. Informative, detailed, with great science yet conveyed simple enough to understand. I like being able to dig deeper into my new hobby of tea with your videos. Keep up the great work.
Thanks so much
Thank You for the great video & information!
You were talking about tea versus coffee and dehydration, etc.…
The question I have Is... tea hat is made into iced tea commercially, then bottled and bought in stores…
As hydrating as if you were drinking your own Iced tea that you made at home?
I love your content, this was another great video. I'll add a personal comment. From my experience (and a study that I read), it's not just that "Higher Temperature = Higher Caffeine", but I believe it's "Higher Temperature = Caffeine Extracted Faster". A cold steeped tea can have a lot of caffeine too, it just takes a lot longer. I don't *believe* there is a threshold whereby a certain temperature is required to extract some of the caffeine; it's just a matter of speeding up the extraction. Of course, this does mean that if one isn't deliberately attempting to extract all of the caffeine from their leaves, over enough steep time or multiple steeps, that higher temperature will effectively mean higher caffeine. I could be wrong about this stuff though! Cheers.
Are there any newer studies? Is the information here still accurate? Thanks for such wonderful video
Well articulated and enthusiastic, you would be a great teacher!
I'm a mate drinker, why am I addicted to this channel lol
You are so good at presenting, your videos are a joy to watch! 🤩
This video was perfect for what I was looking for. Great work!
Great video! This really helps a lot because I'm caffeine sensitive :)
I guess I'll be drinking Spring picked roasted TGY!
Me too i just got diagnosed with Barrett's esophagus, i HAVE to rid myself of caffeine, my life depends on it.
Thanks for taking us on this informative adventure! Your channel is incredibly well-executed. I appreciate your work greatly.
Thank you very much! This video was quite informative.
Thank you very much ! New subscriber here. Pls answer my very basic query as a begginer tea drinker- if someone is making tea just for himself {not many ppl around to share} and want to try Gongfu method that you recommend, then my question is about the subsequent steeps-
1} how many times we can steep same leaves
2} Can same leaves be left in the pot to be used hours later eg.morning and then next steep evening.
3} Will caffeine content get reduced after each steep.
Thanks in advance!☺️
I went wild on the new mei leaf order that came in.
I just had too long of a session with too much leaf. Yep, made me anxious and some jitters. Going to get it out of my system; but for next time I will definitely reduce the leaf and less steep time. What's weird is it was fine after I was done with the session then it kind of creeped up on me a few hours later. I'll try very small next time.
A Excellent Video.. Highly Recommended.. Thank You Very Much For Sharing..
Amazing video. Thank you for your unbiased information.
Always explained so articulately and with great suggestions for reducing caffeine. You rock Don!
Cheers Jake
Awesome info as always! Thanks!
I so love these videos. I'm a beginner and there is so much I do not know about tea
I would really like to see a video about, your 'video making' what cameras, microphones, mobile phone, selfie sticks, tripods, any software that you use. I suspect that many of your subscribers would be interested in this other geeky side. The results are very impressive.
Thanks Don and Celine
Wow ! Learned so much!
Grazie grazie grazie and again grazie! I'm very sensitive to caffeine and these infos helped me so much! Cheers to you and Celine! :)
Brilliant and outstanding!
Thanks for your cristalclear explanation. What are your thoughts about rinsing Pu-Erh for 10 sec at 100 degrees Celsius and than steep it the Western method for 4 minutes at 80 degrees Celsius? Will it decrease the cafeïne level and will the taste be as good as by steeping it at 100 degrees Celsius?