Thursday, November 14, 2019

The Revenge of Cooked Piggy


Dr. Greger, author of "How Not to Die", reviews extensive nutritional data and brings his evidence based conclusions to the public through the nonprofit site nutritionfacts.org. In a video, he discusses that the consumption of cooked meat above 212F has been shown to be carcinogenic, causing DNA mutations which are correlated to an increase risk of breast cancer (Greger, 2013). The carcinogens produced are heterocyclic amines which have been shown to potentially cause and exacerbate breast cancer cells. Dr. Greger notes that PhIP (a heterocyclic amine carcinogen found in cooked meat) seems to have potent estrogenic affects. In an in vitro study, researchers were surprised to discover that the PhIP acts as estrogens which can induce the growth of breast tumors (Greger, 2013). Another study completed in 2004 showed that PhIP consumed in cooked meat activates estrogen receptors almost as effectively as estrogen itself (Greger, 2013). Dr. Greger reviewed another study from 2001 to investigate the carcinogen's effect on breast tissue in the body. This study looked at PhIP in the breast milk of women and found that there was an increase concentration in the women who consumed meat and no PhIP was found in the breast milk of the vegetarian subject (DeBruin & Martos & Josephy, 2001).

He is not the only one who acknowledges this! The National Cancer Institute through NIH also states that meats cooked at high temperatures produce heterocyclic amines. They also state that these heterocyclic amines and polycyclic aromatic hydrocarbons are shown to be mutagenic in laboratory research and may increase the risk for developing cancer (NIH, 2017). According to the National Cancer Institute, cooking any type of meat over 300F is "probably carcinogenic to humans".

I think that it is incredibly important for us as individuals and future health care providers to take a look at what people consume and how this affects the health or disease state of an individual because this information is not made apparent to the public. These types of insights can gear research towards understanding how we can prevent disease and not just treat it. Since nutrition tends to be a controversial topic, we should contemplate our ethics behind food and disease prevention and what that looks like in the world. How does your experience influence your view? Here is some more food for thought..."What is your personal view of health?", "What is the meaning of health to a patient?" I guarantee there are differences. Now what were the key players in those answers, "did disease prevention come up? disease maintenance? equal opportunities for healthcare? happiness? broccoli? shedding big $$$ to big Pharma? consuming heterocyclic amines in cooked piggy?" Jokes aside, I find this very interesting because the practice of medicine is more than knowing the science. It is enhanced through contemplating our personal experiences, which guides our growth and knowledge base as professionals and openness to view a patient as a whole person.


References

DeBruin, L. S., Martos, P. A., & Josephy, P. D. (2001, November). Detection of PhIP (2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine) in the milk of healthy women. Retrieved from https://www.ncbi.nlm.nih.gov/pubmed/11712910.

Greger,M. Estrogenic Cooked-Meat Carcinogens. (2013, January 16). Retrieved from https://nutritionfacts.org/video/estrogenic-cooked-meat-carcinogens/.

Lauber, S. N., Ali, S., & Gooderham, N. J. (2004, December). The cooked food derived carcinogen 2-amino-1-methyl-6-phenylimidazo[4,5-b] pyridine is a potent oestrogen: a mechanistic basis for its tissue-specific carcinogenicity. Retrieved from https://www.ncbi.nlm.nih.gov/pubmed/15319301.

NIH: Chemicals in Meat Cooked at High Temperatures and Cancer Risk. (2017). Retrieved from https://www.cancer.gov/about-cancer/causes-prevention/risk/diet/cooked-meats-fact-sheet.

1 comment:

  1. Hey Caroline,

    I absolutely love your "food for thought". I think it's easy, with so much access to research and science, to make a huge laundry list of things that give us cancer. Many of our future patients will likely ask us questions like "I saw on the internet that .... gives us cancer. Is this true?" While its important to consider all the things that 'give us cancer', I think its also very important to consider all the things that we eat or we do that help prevent cancer. As you mentioned, it's also crucial we discuss preventative or maintenance measures before completely banning bacon. Yes, many of us know drinking alcohol has negative implications but has that stopped us from drinking it? I truly believe nutrition (as with anything in life) is all about balance and moderation.

    So, lets say that a patient comes to you with this information. Maybe the next thing to discuss with this patient is their exercise routine.
    One of the main sources of estrogen for post-menopausal women is adipose tissue, and as you mentioned one of the main target for this sex hormone is breast tissue (Simpson, 2003). Not only does exercise help decrease excess adiposity, it decreases concentration of circulating sex hormones and increases circulating levels of sex hormone binding globulin (SHBG)(Friedenreich et al., 2010). This increase in SHBG leads to a decrease in bioavalibility of sex hormones such as estrogen, therefore less available estrogen available to bind to breast tissue and induce tumorigenesis(Friedenreich et al., 2010).

    While it may be much easier to say "don't eat this ever... don't do that ever..." this often does not lead to attainable or reasonable expectations for patients. It all comes down to educating, encouraging moderation, and tailoring care to your particular patient.

    Happy Thanksgiving (Don't burn your turkey)!

    Danielle Dirks

    Friedenreich, C. M., Woolcott, C. G., McTiernan, A., Ballard-Barbash, R., Brant, R. F., Stanczyk, F. Z., … Courneya, K. S. (2010). Alberta Physical Activity and Breast Cancer Prevention Trial: Sex Hormone Changes in a Year-Long Exercise Intervention Among Postmenopausal Women. Journal of Clinical Oncology, 28(9), 1458–1466. https://doi.org/10.1200/JCO.2009.24.9557

    Simpson, E. R. (2003). Sources of estrogen and their importance. The Journal of Steroid Biochemistry and Molecular Biology, 86(3), 225–230. https://doi.org/10.1016/S0960-0760(03)00360-1

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