Doctor's Note

What is this Ah Receptor thing? Please check out the “prequel,” The Broccoli Receptor: Our First Line of Defense.

I report different mechanisms but similar outcomes in Plants vs. Pesticides and Eating Green to Prevent Cancer. So this all suggests a double benefit of eating lower on the food chain, since it would also entail lower exposure to toxic contaminants in the first place (Industrial Pollutants in Vegans).

How Chemically Contaminated Are We? Check out the CDC Report on Environmental Chemical Exposure. Where are dioxins found so we can avoid them in the first place? See Dioxins in the Food Supply.

For more context, check out my associated blog post: Counteracting the Effects of Dioxins Through Diet.

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  • Adrien

    Camel Pee ?! WTF ? Can there be an evolutionnary explanation of that mysterious discovery ? Since I don’t beleive in coincidence… I don’t want to imagine any further what possibly happened in our african past. :O

    • Leslie

      Please remove the “WTF”. We all know what it means and I think this website forum is best served in the absence of implied foul language. No judgment here, I know you mean well, and you did provide an interesting idea with our past….evolutionary happenings.

      • brec

        [Rolls eyes]

        • Leslie

          The word “F” is a very degrading word to some women. We find it very insensitive. It can single-handedly hurt someone’s feelings when used in conversation/text. It can also ruin someone’s day. Most of us here (all of us, I hope) get this. And I find people don’t have bad intentions, they just are not aware of how their actions effect others, at times.
          We help each other by waking our fellows up. And hopefully do so with kindness.

          • pres68y

            When I see ‘WTF’ I think of it as What The Fantasy – try it, you might like it!
            (also, might give you more time to think about the subject matter, rather than simply its delivery)

          • b00mer

            My favorite interpretation:

          • Wegan

            F is not a word!

          • Padric O’Fish

            Luckily for you, “some women” (like your mother) aren’t as hypersensitive, and thus, you are here. To complain about “F”.

            How ironic.

        • Darryl
      • ldm

        Leslie: I concur. This website is not the place for implied foul language. Let’s keep the focus where it belongs:exceptional nutrition and the research.
        Adrien: No judgement, just a friendly reminder for all of us.

        • brec

          The comment to which I’m replying is the third, excluding my own eyes roll, that has nothing whatever to do with nutrition. “WTF” is an common expression all over the Web and in many instances, as in the initial instance here, there is nothing unkind or rude in its use.

          So let’s stick to nutrition rather than attempting to impose our linguistic preferences on others, eh?

          This will be my last off-topic comment in this thread.

          • Paul Spring

            And that no BS

        • plockett

          If you want to keep the focus on nutrition and research, you fail miserably by posting only to criticise somebody else speech, saying nothing about either nutrition or research in the process.

      • Brandon Klinedinst

        It’s really not appropriate for you to go through life just waiting for your next opportunity to be offended by nothing.

      • Adrien

        Sorry if I “ruined” someone’s day. But I find it difficult to believe it. I’ll be more careful in the future. A future where we can no longer say “Oh my god” or “For christ sake”, since it can offend some people. Beside, it was not my will to offend any, and I think everybody got it. I just use it as a way to express that I was shocked by the fact that another mammal’s urine got a substance that can enhance our immune system, and figure it out how it happened from an evolutionnary perspective. Further more, my original comment was – I beleive – like the end of the video, on the humour side. Maybe it’s totally inappropriate or maybe it’s my poor understanding of the english language, but I just don’t see why my statement can possibly be “very degrading to some women”, If it is, it should not, in my opinion. Hoping this answer will not trigger unnecessary debate. I whish you a good day and a life In Health. Adrien.

      • Padric O’Fish

        Leslie are you serious? While “WTF” may not be cool in a scholarly journal, I doubt anyone would have noticed it if you hadn’t added the tempest to this teapot.

      • Chip

        Oh jeez Leslie, relax. BigFDeal if you get my drift. I thought when my wife got breast cancer last year it was F’d up, trust me. So there. That is why I am here on this site after meeting the man (Gregor) himself at Healthy Ventura with my wife and I going vegan on that date. Her breast cancer markers have been low to the point her doctor says her blood appears like someone who has never had cancer thanks to a healthy lifestyle and no chemo or rads. If you ever get cancer, you will see it is a pretty F’d up deal. Hopefully you won’t if you follow this great man’s advice. There are many more things in life to worry about than what comes out of people’s mouths or their fingers in this case. Be strong and quit eating meat and dairy. That’s your challenge for today.

  • Leslie

    This is great. It reminds me of the kiwi DNA repair study. Speaking of which, is it the flesh of the kiwi, the skin of the kiwi, or the chewed up seeds of the kiwi that provide the beneficial aspect in the DNA repair?
    Or is it some combination? I didn’t pick up on an answer to this in any of the videos, and I find that most people don’t eat the kiwi skin nor grind up the seeds with there teeth.

    • Adrien

      It reminds me of the plant vs pesticides video:

    • brec

      Most people — true. But I like to eat the skin: I eat a kiwi as one would an apple, except I discard the ends rather than the core. I rinse it well first.

    • Gustavo Adolfo Ⓥ

      Leslie could you refrain from using DNA – it’s offensive to some public servants who have been traumatised by the unregulated use of acronyms – I would feel safer if you used the full Deoxyribonucleic acid next time thanks.

  • Veganrunner

    Ok. Normally when you mention a new food with health benefits is goes right into my morning blender. I have a feeling this one is going to be more difficult than Alma to find! :-)

    • Duke

      Who’s Alma? Where’s Alma?

    • Darryl

      There is a revered tradition.

      • ldm

        Darryl: thanks for the link. Interesting but no way! :0)

  • Sojourner

    I know you like being on the “Leading Edge”/but this one is about as far out there as you tend to venture. Suggestions for where to get this great item and in what form/and to consume how much? And when? This will take some time to “digest” :-)

  • Darryl

    Detoxification? Sounds like a job for the Nrf2-mediated Phase II response (activated by many phytochemicals). And sure enough, Ahr is acting at least in part by upregulating Nrf2 (1), and some important cytoprotective genes have both XRE (for Ahr) and ARE (for Nrf2) promoter sequences (2). Seems Ahr is the transducer for planar aromatics, whereas canonical Nrf2 induction via Keap1 detects electrophiles (3), a neatly evolved integration of xenobiotic detection to generate common stress responses.

    • Dan

      Darry, you are incredibly knowledgeable about nutritional biochemistry and physiology. I wish the evidence for nutritional research included more Level 1 evidence (large randomized trials with hard outcomes like the PREDIMED trial). It is difficult to know how well these basic science findings translate at a causal level in real people without the benefit of large randomized controlled trials.

      • Darryl

        RCTs are a gold standard, but expensive, and I believe funding will grow ever more difficult for non-drug trials. My hope for better epidemiological evidence lies with larger health-oriented vegan or near-vegan cohorts in the general population, and developing world cohorts who retain traditional diets while benefiting from modern sanitation and vaccination.

        We’ve known for 30 years that cruciferous vegetables are chemopreventative for cancer. Basic science is throwing out numerous plausible explanations, but I’m not sure there’s a lobby big enough to fund the definitive RCT (hello David Murdock).

        • Dan

          There was an interesting editorial in Canada’s national newspaper today with the headline “99.9% of nutritional research is garbage”. I couldn’t agree more. I tune into Dr John Ioannidis (sp?) and his views that so much of biomedical research is pure bunk. Without RCTs, we will never know what is fact and what is fiction. Instead we are called to embrace an ever greater creed called “nutritionism” based on basic science alone in our ever more orthorectic ways of eating.

          The fact that molecule A kills mutated cancer cell line B in vitro means absolutely nothing in comparison with what 100,000 people eating food containing molecule A (along with a couple thousand other molecules) for five years do, in terms of development of that type of cancer, versus 100,000 people who do not eat food containing molecule A (along with a couple thousand other molecules). The former is a fallacy, the latter is real science and I’d argue unachievable in today’s current trial climate. But PREDIMED lights the path towards best research practices in nutrition, flawed as this trial may be. And self-reported FFQ’s are hopeless, as Archer has recently pointed out.

          • Plantstrongdoc M.D.

            I understand what you mean, but we will probably not see many RCTs on plantbased diets. There are many reasons for that: They are expensive, very time consuming, no pill to sell, a trial will take many years if you want real hard endpoints – death, cardiovascular event, cancer – and not accept surrugate markers, compliance to a plantbased diet could be a challenge compared to popping a pill and a vegan diet is not enough – it has to be WFPD. There are a lot of epidemiological evidence suggesting that a plantbased diet is the best diet for humans, and epidemiological evidence involves real people, living real lives so there are a lot of usefull information in epidemiological studies. I know, it is not RCT. Personally (based on our current knowledege) I am convinced that a diet primarily based on vegetables, fruit, legumes and starch is the optimal diet, but of course one can always argue that I am a fanatic orthorectic doc, but on the other hand I also say, that there are not enough evidence to say that a 100% plantbased diet is better than a 98% plantbased diet – I dont think that an occasional piece of cheese or chicken will kill ya. Unless you get food poisoning…

          • Dan

            Well, I got food poisoning from kale – it was either a nasty GI bug or intestinal angioedema with profuse, watery diarrhea and tenesmus lasting 5 days. Remember that the field workers that often pick our crops – and this sounds elitist – often have conditions like hepatitis A and may not have the best bathroom hygiene. Most of the produce in Canada seems to come from Mexico. I am slowly moving towards organic but I doubt this will fix the problem.

            I kinda agree with you except for the starch part. Having had significant metabolic syndrome (with 3 or 4 of the major NCEP criteria out of 5), limiting my starch has dramatically improved this condition as well as all the associated risk factors (BP, lipids, visceral weight/waistline). I know people advocate for 80% starch-based diets but I am big time into complex carbohydrates to the greatest extent possible (meaning soluble and insoluble fiber). I don’t consider starch to be a complex carbohydrate – maybe I need to be corrected here.

            Ornish did an RCT of a vegan diet with both hard outcomes (coronary events) and surrogate markers (degree of coronary stenosis in %). It was a very small trial but still published in high-impact journals (Lancet, JAMA). The Lyon Heart Trial in 605 patients showed dramatic reductions in CV events – Lancet and Circulation. The St Thomas Atherosclerosis Regression Study (STARS) with a very low fat diet showed dramatic reductions in both hard events and coronary stenosis (Lancet). It was a very small study (<200 patients, if I remember correctly, with 3 arms). But dramatically positive. Of course, PREDIMED with about 6000+ patients published in NEJM with a mean follow-up of just a couple years.

            If all the gurus got together and approached NIH for funding, a trial on the order of the Women's Health Initiative low-fat trial could be done, probably at a fraction of the price, greater compliance, with shorter follow-up. Remember that was a $400,000,000 trial that failed, in 48,000 women followed for a half-dozen years.

            How do you go about advocating plant-based diets to your patients? Do you use a handout? If so, would you mind emailing it to me at

            Many thanks

          • Plantstrongdoc M.D.

            Thanks for your answer.
            I work in a tertiary center and my patients have not diet-related diseases (as far as I know!).
            Regarding the starch, I mean the healthy ones: Brown rice, barley, quinoa, rye-bread. But I confess to eat potatoes and white rice (aaarrrrggghh!). Agree, if one have metabolic issues it has to be complex carbs.
            Are you a G.P.?

          • Dan

            Clinical pharmacologist specializing in vascular medicine patients. I too am in tertiary care. And ALL of my patients have diet-related diseases (as did I, and still do, to a certain extent, whenever input of calories exceeds output of calorie expenditure).

          • beccadoggie10

            Kale and collards, while especially nutritious when grown by the organic method, are very high in pesticides and herbicides grown by conventional agriculture.

            Herbicides are mineral chelators and according to retired Purdue professor Don Huber. they bind the minerals in the soil and make them unavailable for plants and the animals/people who eat the plants.
            Listen to the video at:

  • Jasmine Riccardi

    Ok, you convinced me, i’ll eat even more veggies than i already do. ;-)

  • Paul Spring

    So, where can I buy this camel urine? Amazon?

    • Nutritarian

      Good Question! I was about to ask that too. And does the good Doctor consume this product? Recommendations for amount and frequency. Best Alternatives?

  • brec

    Dr. Gregor has made many videos that justify my decision to eat only plant-based food products, but this one may be the most compelling.

  • Plantstrongdoc M.D.

    Anyone selling a camel…..?

  • harpers faerie

    Who would’ve thought to test camel urine? And who drinks camel urine?

    • beccadoggie10

      A plant based diet of dark leafy greens, onions, mushroooms –vegetables–berries (fruits) maintains more healing properties than eating dioxin which accumulates and concentrates in the fat of animals.

      Who would drink the urine of camels?
      Those dying of thirst on the deserts of Africa.

  • earthfirstnow

    Dear Dr. Greger,

    I prepare the green or white tea that I drink (daily) by soaking teabags in a clear glass pitcher of unheated (cold) water. My concern is that the fluorescent bulbs that I use in my kitchen might be causing a deterioration or loss of valuable phenols, flavonoids, and antioxidants in the tea.

    Are you aware of this issue? Please tell me if there is some nutrient loss in the tea due to artificial, fluorescent light.

    I appreciate your time and thought on this matter.

    Thank you.

  • lexmelinda

    Thanks for all the great information here! Your site is regular affirmation that my WFPB diet is the right choice. QUESTION: Any studies on how a WFPB diet can help treat restless leg syndrome? It runs in my family. Thanks again, Dr. Greger.

  • Hsn

    science found out just recently but prophet Muhammad s.a.v. has recommended as a cure for some people. But not every camel, the camels that are eating naturally not the feeded ones.

  • Em Crone

    I was laughing so hard about telling ones’ kids that it is either veggies or camel pee!!!! Hahaha I love your videos sir :)

  • Derrek

    Is gluten really healthy for you? A lot of people I know recommend to not eat it.

  • aviweiss
  • Derrek

    Any videos on fluoridation of water and also fluoride in toothpaste?