Doctor's Note

Check out these videos for more on the health benefits of tea:
Herbal Tea Update: Rooibos & Nettle
Antimutagenic Activity of Green Versus White Tea
Herbal Tea Update: Hibiscus
Better Than Green Tea?

And check out my other videos on tea

Also, for more context see my associated blog posts: Breast Cancer and DietRooibos & Nettle TeaStool Size and Breast Cancer RiskIncreasing Muscle Strength with FenugreekHibiscus Tea: The Best Beverage?Is Caffeinated Tea Really Dehydrating?; and Soy milk: shake it up! 

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  • Michael Greger M.D.

    Please feel free to post any ask-the-doctor type questions here in the comments section and I’d be happy to try to answer them. And check out the other videos on tea. Also, there are 1,449 other subjects covered in the rest of my videos–please feel free to explore them as well!

    • t091582

      one comment and one question:
      1. Dr. Blaylock says NEVER squeeze lemon in tea as it brings out the aluminum.
      2. question: about 10 years ago there was much comment about white tea having even more antioxidants than green tea. But in recent years I have not seen anything else about this.. Just wondering if you feel white tea is better than green??
      thank you.

      • Thea

        t091582: I think you will be interested in the following video which compares green tea to white tea.

        The thing about the lemon makes no sense to me (as a lay person). But if squeezing lemon concerns you, then you would want to stick with green tea. (You’ll see why I say that after watching the above video.

        Good luck.

        • t091582

          Thanks for that!!!

  • myjolina

    Hi Doc
    Two questions: with fibromyalgia, I am constantly waking up in the night – is there a way to know whether I have reached the delta sleep?
    Also, I have always read that meditation is a deeper sleep than what sleep is – so, are you saying that drinking tea will actually restore the brain patterns that loss sleep caused and that there is no benefit to meditation?

  • wickedchicken

    Wow. I meditate and have drank a lot of tea in my time…. no comparison, meditation gets my high score.

  • Michael Greger M.D.

    Also be sure to check out my associated blog post Breast Cancer and Diet!

  • Phil

    Have the Monks been briefed? =D

  • Gabrielle

    Is this the same tea plant (and effect) in black tea? or is it just green tea?

    • Mark R. Mach

      Both black tea and green tea come from the same plant, as well as oolong and white tea. I don’t how these particular effects vary between the different types of tea.

  • Is Hibiscus Tea better than Green Tea? Or do both have different effects?

  • Johnny T.

    What about decaf green tea? Just as effective as regular?

  • Eva

    Wouldn’t the caffeine counteract the relaxing effects of the theanine? I’m very sensitive to caffeine; it makes me anxious. How could I get the benefits of green tea without the effects of caffeine? Is that at all possible?

    • Toxins

      If you are sensitive to caffeine, you can always find decaffeinated green tea.

  • Cynthia C

    How quickly does the effect dissipate after drinking a cup of tea? Basically, how often to I need to drink it to keep up the effect all day! I need this!

  • Tobias Brown

    I started drinking green tea based on the reports here and I plan to continue doing so. However, in my enthusiasm, spurred by the more recent video on cold brewing green tea, I recently started drinking half a pitcher a day. But I’m quite sure I had a strong reaction against this which caused my eyes to be very heavy upon waking in the morning as well as a general feeling of sinus congestions, and a bit like feeling “hung over.” My research suggested that it was likely the histamine in tea or possibly the caffeine which would have a dehydrating effect. I stopped with the tea and the sensation went away within a couple of day. So, is there anything to this? Should we limit tea to 2-3 cups per day? This video suggests that 2 cups is enough for this considerable impact so… is more always better?

  • Analisa

    Dr. Greger, what about the high concentrations of aluminum in green and black teas? According to the NCI, “aluminum can accumulate in the body and cause osteomalacia
    and neurodegenerative disorders, especially in individuals with renal failure” — not to mention, Alzheimer’s disease. While NCI also states that it’s not clear how much of the aluminum in tea is bioavailable, wouldn’t it be better to stick with herbal teas (like Hibiscus) just to be safe?

  • k

    hi dr. greger, and thank you for the wealth of information you provide here!

    on the question of green tea, i am wondering how white tea stacks up?

    white tea seems not to have been as widely studied and the only information i can find is that it’s antioxidant content is higher than green tea or other teas. is it possible that the fermentation process yields benefits in green tea that are not present in white tea, since it is not fermented?

    i’ve been drinking organic pai mu tan for years now but now i’m wondering if that is the right choice. any thoughts would be welcome!

  • tavit

    I wander can I drink green tea safely if I’m 22 and have per-hipertension (133/75).

  • ReluctantVegan

    I’m in the USA. Anyone ever noticed that in British films, whenever a situation becomes emotionally difficult for someone, they are always offered tea? (In addition to the requisite tea drinking at every possible juncture of the day.) I also noticed this when I visited England. I always thought it was because the English were uncomfortable expressing or talking about emotions – and uncomfortable being around someone who might be about to lose their composure (even if for a good reason). Is it possible that this emotional-tea-offering is NOT because they can’t stand emotive situations, rather, should it be seen like offering someone an aspirin for a headache?

    If you are from The Commonweath, I invite your comment.

    • Thea

      ReluctantVegan: I’m from the USA too, so I can’t meet your request.

      But I wanted to say that I thought it was an interesting post and that it reminded me a bit of the Big Bang Theory — a TV show. One of the main characters in the Big Bang Theory has trouble with social skills. But he is able to remember rules. One of the rules his mom taught him was to offer friends hot beverages for various emotional situations. In the show, there is a different, specific hot beverage for specific emotions. Ahh. If only life were really that easily fix-able.

    • Matthew

      I feel like I can relate to what you said. I always felt a calming, yet mildly stimulating effect from drinking black tea aka “a brew” in the north west of England or “a cuppa” in London. It is a nice comfort in uncomfortable times, wether it be the dull, cold and messy weather that we have most of the year, or after having to endure some mundane job all day long.

  • Matthew Smith

    Matcha tea is extraordinary at causing the alpha brain wave and is used to aid meditation.

  • Daniel

    Typo or misspoke at 0:20?

  • Nina Polizzano

    I drink 2 cups of Puerh tea daily to keep my cholesterol down. It was recommended to me by a tea store. I’m concerned about the lead content since it’s from China. Would other teas also lower my cholesterol? I am not on medication and I eat a whole food, plant based diet. I’ve added hibiscus tea in the afternoons. Not sure which tea lowered my triglycerides significantly but one of them has. Should I eliminate Puerh tea and what would be my replacement tea for cholesterol help?

    • Matthew Smith

      Hello. I drank tea for mental health problems which it did not solve, though causing the alpha brain wave was supposed to be the highest calling of psychiatry. I found out about orthomolecular medicine, which said all people with dark shiners underneath their eyes have a milk allergy, all people on city water with spots under the nails have a zinc deficiency, and I have pellagra, a Niacin deficiency. You probably, like many kinds of life, have a shortage of Nitrogen because your food is being cooked. I took two grams of Niacin a day and am much better. You should consider researching vitamins, megadosing, and othromolecular medicine for high triglycerides. You are a fine person, not a traitor, and are someone I believe in. People with Niacin deficiency have superior genes. They are shock resistant, are artists, scientists, poets, philosophers. They are brilliant people some of whom have Nobel Prizes. They almost never get cancer. There is hope. I have been saved from my schizophrenia by vitamins to an extent. I hope you find the joy in hearing your high triglycerides is a biochemical problem, not a genetic one. Good work.

  • JunkFoodVegan

    This video is life changing!!! Until now i never was fully ready to replace coffee with tea,for the main reason, that coffee is stronger stimulator than tea and helped me to focus,the most bothersome downside for me,was that my anxiety was elevated when i drink it,I thought that substituting coffee with tea wouldn’t help ,since tea also contain caffeine,until i saw this video,this is so great! we can enjoy both worlds,stimulate our brain(though less strong effect than coffee) and at the same time feel calm without stress or anxiety.

    Thank you Michael Greger for this video,It assisted me to make a best choice!

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