How Plant-Based to Lower IGF-1?

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DESCRIPTION: Those eating vegan had significantly lower IGF-1 levels and higher IGF binding proteins than those just eating vegetarian, suggesting that the more plant-based one’s diet becomes, the lower ones risk of fueling growth hormone dependent cancer growth. To review, I started out introducing Nathan Pritikin ( and the elegant series of experiments that became part of his legacy ( They 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 BPH at and specific foods that may help at I also asked and answered Is It the Diet, the Exercise, or Both? ( We learned that the cancer promoting growth hormone (IGF-1 seemed to be The Answer to the Pritikin Puzzle ( but why? What is it about plant-based diets that lower IGF-1 levels and increase our body’s ability to neutralize IGF-1? Find out in Monday’s video-of-the-day Protein Intake & IGF-1 Production (

Have a question for Dr. Greger about this video? Leave it in the comment section at and he’ll try to answer it!

Image Credit: Pritikin Longevity Center, and twob and Ana Santos via Flickr.

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