Vegan Men: More Testosterone But Less Cancer

NF-Feb12 Less Cancer in Vegan Men
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Just a few days of walking and eating healthy plant foods can lower the level of the cancer-promoting growth hormone IGF-1 enough to reverse cancer cell growth in a Petri dish. This is detailed in my last three blog posts Cancer-Proofing Your BodyTreating an Enlarged Prostate With Diet, and How do Plant-Based Diets Fight Cancer?

We know decreasing animal product consumption decreases our IGF-1 levels, but how low do we have to go? How plant-based does our diet need to get? In my 2-min. video How Plant-Based to Lower IGF-1? the IGF-1 levels are compared between men and women eating conventional, vegetarian, and vegan diets.

Vegan men tended to have significantly higher testosterone levels than both vegetarians and meateaters (see graph here), which can be a risk factor for prostate cancer, the reason plant-based diets appear to reverse the progression of prostate cancer may be due to how low their IGF-1 drops (see Cancer Reversal Through Diet?).

Boosting cancer defenses within just days of eating healthy is a remarkable finding. For those interested in the whole story, I started out introducing Nathan Pritikin and the elegant series of experiments that became part of his legacy.

Researchers were able to demonstrate the mechanism by which a plant-based diet and exercise could suppress the growth of breast and prostate cancer cells and protect against prostate enlargement (more on prostate problems in Some Prostates are Larger Than Others and Prostate Versus Plants).

I also asked and answered Is It the Diet, the Exercise, or Both?

Finally, for those interested in whether lower levels of growth hormones in vegans might interfere with the accumulation of muscle mass, see my 3-min. video Plant-Based Bodybuilding.

-Michael Greger, M.D.

PS: If you haven’t yet, you can subscribe to my videos for free by clicking here and watch my full 2012 – 2014 presentations Uprooting the Leading Causes of Death, More than an Apple a Day, and From Table to Able.

Image credit: edwick / Flickr

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  • http://www.facebook.com/eogrey Eric O’Grey

    Thank you so much for posting this, I’ve been wanting to share my personal experience and do a blog post about this forever! http://vegandinnerparties.com/are-omnivore-men-more-manly-than-vegans/

  • Ray Mitchell

    Nearly all of your posts and videos relate to the impact of whole plant foods on the physical body. Are you finding anything on the impact of diet on mental health, intelligence, personality and mental disease? This subject are really interests me. The closest thing I am aware of is your material on Alzhiemer’s. What about bipolar disorder? Schizophrenia? What about sleep, dreaming? Apnea is related to weight and hence is impacted by diet. What are you seeing in the literature?

  • Avi

    “Vegan men tended to have significantly higher testosterone levels than both vegetarians and meateaters (see graph here), which can be a risk factor for prostate cancer,”

    I am confused doctor, it basically says that Vegans men are more likely to get prostate cancer?

    • Joao Burini

      No. Lower IGF-1 counters that.

      • IAMTHELEAKER

        That’s poorly articulated in the article.

  • rick

    reccomendations for diet for chd and chronic heart disease?

  • Colin P. Müller

    Vegan men are also whiny liberal P U S S IES. I rather eat steak and be a real man.

  • Jo

    I am a 33-year-old male, recently turned vegan (from vegetarianism). I suffer from low testosterone levels, and I have not seen them improve as a result of transitioning to veganism. (Stress and a one-time testosterone injection may have been a factor at some point in suppressing my own production of the hormone, but I am currently happy, low-stress and vegan and still have below norm levels.) Before I decide to take hormones for the rest of my life – I might not have a choice – I was wondering what vegan foods in particular could help me to boost my testosterone, so that I could try them over the next few months. I have also been avoiding soy recently due to the possibility that plant-based estrogens come into play.
    I am quite struck that your website says that on average vegan men are doing better with testosterone.

    • Thea

      Jo: Sorry to hear about your hormone troubles.

      I don’t know the answer to your specific question, but thought I would point out that Dr. Greger does have a video or an article about how licorice can lower testosterone levels. So, that would be one food/tea to definitely stay away from.

      Good luck.

    • Toxins

      What constitutes your vegan diet? Are you avoiding processed foods? Do you eat plenty of greens, whole grains, and fruits?

      • jo

        Thanks for your prompt responses. I didn’t realize that they came so fast.
        I do eat plenty of fruit and vegetables, nuts, and whole grains. Should I be consuming more fat? Anything in particular? Any key nutrient that I might be missing?

        • jo

          p.s.
          I do not consume much processed food.

        • Toxins

          I am not an expert in the area of raising testosterone. You can try including ground flaxseed in your diet to see if it helps. If your diet is made of whole unrefined plant foods then I am unsure what specifically there is I can recommend. Perhap others may respond to this issue.

          • jo

            Thanks for letting me know.
            By the way, if there is any clarification needed, I am not sharing my story in order to discourage anyone from becoming vegan or anything. The internet is full of stuff about veganism not being good for one’s testosterone levels, but I have no idea if that’s credible at all. It might well be the case that I have a diagnosable condition that’s unrelated to my diet.
            If anyone else on your team can chime in with more ideas, that would be greatly appreciated.
            Thanks for your ideas!

          • Eisenhorn

            google PES Erase + DAA for test. Legal and safe just check it out, I’m not selling you anything here.

          • Vaalea D

            Hi Jo, this page might be helpful.

            http://bonzaiaphrodite.com/2013/01/facing-failing-health-on-a-vegan-diet/

            She says “Cholesterol is a type of fat found only in animal foods. Vegans do not intake ANY dietary cholesterol. Human bodies do produce cholesterol, however, that’s only if the body is healthy. Cholesterol is produced in the liver. My liver had been abused by many years of drinking, smoking, caffeine, and then eventually, pregnancy.

            Cholesterol is the precursor to all sex hormones (like estrogen, progesterone, etc). Without adequate cholesterol, the body cannot make hormones.”

            Then she goes on to describe the dietary changes she made to improve her health “Eating as much saturated fat (coconut products, cacao butter) as possible because saturated fat stimulates cholesterol production. Also, eating plenty of other healthy fats, like olive oil, nuts, and avocados.” but adds ” I would be remiss if I didn’t mention that although I believe a low-fat vegan diet is excellent for reversing and curing many chronic diseases, that does NOT mean that it’s the right diet for everyone. A diet for healing is different than a diet for maintenance,”

    • Daniel

      you must consume cholesterol, hormones are made of of that

  • Alexander Mark

    You say that vegan men have HIGHER testosterone… yet nowhere do you cite this. You link to an irrelevant graph (one also produced by you). Where is the research that shows vegan men have higher testosterone?

  • sceptic

    Why does the photo only show mannequins? Is it that hard to find a muscular vegan male?

    • JacquieRN

      Just switching it up! Not hard at all…

      http://www.sherdog.com/fighter/Mac-Danzig-3396

      This guy is crazy huge: http://on.thestar.com/1hww4Xf

      http://www.veganbodybuilding.com/?page=news

      How about a google image search – not bad!

      • Thea

        JacquieRN: Nice!

        Here’s some more serious vegan muscle:
        This guy recently broke a world record in weight lifting. “Congratulations to Strongman Patrik Baboumian who yesterday took a ten metre walk carrying more than half a tonne on his shoulders, more than anyone has ever done before. After smashing the world record the Strongman let out a roar of ‘Vegan Power’…” For more info:
        http://www.onegreenplanet.org/news/vegan-strongman-patrik-babaoumain-breaks-world-record/

        Other vegan muscle of interest:

        (article from meatout mondays)
        Vegan Bodybuilders Dominate Texas Competition

        The Plant Built (PlantBuilt.com) team rolled into this year’s drug-free, steroid-free Naturally Fit Super Show competition in Austin, TX, and walked away with more trophies than even they could carry.

        The Plant Built team of 15 vegan bodybuilders competed in seven divisions, taking first place in all but two. They also took several 2nd and 3rd place wins.

        For More Info:
        http://www.plantbuilt.com/

        • Thea

          OOps. I see you already linked to the weight lifter guy. Oh well, it’s fun to see him twice.

          • http://batman-news.com J Hubbs

            Patrik did not build that body with a vegan diet. Getting jacked eating an omnivorous, meaty diet and then switching to veganism is not the same as building up from scratch. Bill Pearl who is also always brought up, falls into this category, though he was lacto-ovo, I believe.At least Patrik is big, badass, and strong though. Some of the guys you vegs like to cite are skinny (by musclehead/bodybuilding standards) and unimpressive. Absolutely not taking away from these guys, but the only problem I have with vegans is the widespread disingenuousness, and sometimes outright falsehoods.

          • RunsWithPoodles

            The meat and dairy industry must make you crazy!

  • Alexis

    Hi. I’m a 28 year old female vegan bodybuilder. How much protein do I need if I were to weight train six days a week for a hour.