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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. Be sure to check out the corresponding blog post Eating chicken may lead to a smaller penis as well. Also, there are 1,449 subjects covered in my other videos–please feel free to explore them!

  • Jennifer Eldred

    What about DEP that go in fragrances are there any human studies for that?

    • Michael Greger M.D.

      Such a great question Jennifer! Before we knew that there were any of these industrial pollutants in the food supply, the levels in cosmetic and personal care products were in fact the number one concern. The most recent review on the subject that is available full-text online is “Toxic effects of the easily avoidable phthalates and parabens.”

  • Michael, do you know if these statistics would also be relevant for Australia?

  • Eric Needs

    Great, all my mom ate when she was pregnant was chicken. NOW look at this thing! (jokes)

  • klickityklack

    Very interesting research. In light of some other (conflicting) studies that show phytoestrogens also impact genital development — in your view, what protein choices are best for expectant moms?

    Also, do we have any data from the Food Science world measuring the levels of phthalates in organic vs. conventionally produced meat/animal-based foods?

    • Toxins

      Hello klickityklack! I believe I can assist you with your question!

      Regarding the comment on phytoestrogens, phytoestrogens actually do not affect male estrogen levels. Dairy actually increased levels significantly. Check out Dr. G’s video on that here:

      Regarding the protein question, it is of no concern to focus on eating protein if you eat a whole foods plant based diet. All plants are complete proteins. The American Dietetic Association acknowledges this fact and states that “Plant protein can meet protein requirements when a variety of plant foods is consumed and energy needs are met. Research indicates that an assortment of plant foods eaten over the course of a day can provide all essential amino acids and ensure adequate nitrogen retention and use in healthy adults; thus, complementary proteins do not need to be consumed at the same meal” Basically, if you eat when your hungry and till your full then your getting enough protein for you and your baby since your body will be hungry when you need more energy. You also don’t need to compliment different foods since each plant source is a complete protein in itself. The world Health Organization also claims that we do not need too much protein. About 0.45 grams of protein per kilo of body weight. This is a moderate level and doesnt come out too much. Dr. McDougall also states that protein is also used in small quantities every day so we really do not need to focus on getting it specifically. As stated before, eat a balanced whole foods plant based diet, eat till your full and when your hungry and you will be well off. Spinach is 51% protein whereas beef is 37% protein!

      Regarding the difference between conventional and organic products, As Dr. T. Colin Campbell puts it, the differences between organic and conventional meat in compositional makeup is insignificant. It is still the same lack of phytochemicals and antioxidants and the same type of nutrients and protein. Organic is more of just a label on meat on a health standpoint.

      Hope this helped!

  • amcken3

    What I’m wondering is how these companies get away with this. Arsenic is a POISON, they finish off the chickens with ARSENIC. They should be prosecuted for attempted murder. That would set a strong message. WHY ARE WE TOLERATING THIS!?

    • Your mother

      Kill yourself you worthless, illiterate, large foreheaded, club weilding, cave dwelling, cunt.

  • robert

    hey doc. can the phthalates, dehp etc, be detox out of the body and by nutrients, supliments etc. thanks.

    • Your body will clear these substances naturally so the best way to detox is to avoid intake and let your bodies normal mechanisms via the liver and kidneys do their jobs. The good news is phthalates clear relatively quickly as opposed to dioxins whose half lives are estimated to be 1-7 years see…

  • Victoria Alice Westwood

    Dr Greger – I would love to hear your opinion on the latest craze in the fitness industry namely ‘Intermittent Fasting’. Proponents claim that it not only sheds excess fat from the body in a short amount of time, but also has many other benefits including better glycaemic control, reduced levels of IGF-I and reduced oxidative stress. I thought these were all benefits of a plant-based diet! Are there any benefits to IF that extend beyond a vegan diet? Are there any potential harmful effects? Many thanks, Dr Westwood, UK.

  • Tatiana

    Dear Dr. Greger,

    My 24 year old son was diagnosed with testicular cancer this year. I follow you and your studies closely and am wondering if you ran across any correlations or observations in reference to this rare cancer. I would appreciate any input including any dietary suggestions. We follow a high vegetable/fruit diet and he eats meat, eggs occasionally. He is allergic to dairy.
    Truly appreciate your time and website! Tatiana

    • I have seen no studies relating to any of the types of testicular cancer. In general whole food plant based diets are associated with less cancer for a variety of reasons. I would tend to avoid meat, dairy, eggs and fish. You might benefit from resources on the website from The Cancer project see You may be able to find a Food for Life instructor in your area who is giving a series of cooking classes. The other advantage to eating whole food plant based diet is avoiding other chronic diseases. Good luck.

  • Paul Webster

    People have been eating chickens for many years and there has not been a problem so I would think it must be something in the new food, drugs, etc.

  • Carlee

    Does this data also apply to organic chicken and eggs? This information in your video would be helpful.

  • shazad

    HI this is shazad i want to ask a tips about penius enlargment my penius is so small upto 3.5 inch and my age is 23 year and i m very worry about it.I cannot afford any expensive supplements so plz suggest me sir what should i do i should gain my proper size.
    plz send your answer at my

  • Sebastian Tristan

    O.K. Now, it’s personal!

  • Esquimal

    Very interesting thanks. Would you think is safe to eat organic eggs and organic chicken/turkey during pregnancy and breast feeding?

    Many thanks

    • I would avoid both eggs and chicken and turkey not only during pregnancy but also before and after pregnancy. My daughter went through both her pregnancies following a whole food plant based diet and was easily able to meet her protein and nutritional needs. Of course you need to work with your physicians. A good resource for information so you can work effectively with your physicians is… Reed Mangels, The Everything Vegan Pregnancy which also covers infants (note PCRM also has free booklet Nutrition for Kids available for free download). She also has free resources online at or Another resource is Good luck and keep tuned to as the science keeps coming.

  • limmy

    Hi talking about shrinking of penis of boy , what about middle age men thanks

  • JG

    What about studies like this It says that vegetarian women were much more likely to have a son with hypospadias. Is it because of the soy, or something else entirely? Thank you.

  • nick

    are these in organic chicken as well??

  • Curious Private

    Sadly, I can vouch for all the research done here… I feel like as if I’m described in your video! But nevertheless, I gained a lot of stuff from my parents other than ‘manly virtues’. All of my insecurities are nothing when compared with the experience I gained growing up with them, so I’ll just hate the chickens instead haha. I’m gonna fasten into my vegan-diet transition after watching this.