Why might we want low levels of IGF-1 in adulthood? See IGF-1 as One-Stop Cancer Shop. As we saw in How Plant-Based to Lower IGF-1?, vegan men have higher testosterone levels, which can be a risk factor for prostate cancer and enlargement, but given the average IGF-1 levels of those eating plant-based diets this may not be an issue. See Ex Vivo Cancer Proliferation Bioassay, and Prostate Versus a Plant-Based Diet. Having said that, if they eat excess “high quality” protein, they may not retain their IGF-1 advantage. See Higher Quality May Mean Higher Risk; Animalistic Plant Proteins; Too Much Soy May Neutralize Plant-Based Benefits; and How Much Soy Is Too Much?
For more context, check out my associated blog posts: Stool Size and Breast Cancer Risk, and Vegan Men: More Testosterone But Less Cancer.
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Original article and pictures take nutritionfacts.org site
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