Testosterone also drops from high consumption of animal products.
[1] Clinical studies show no effects of soy protein or isoflavones on reproductive hormones in men: results of a meta-analysis.
https://www.ncbi.nlm.nih.gov/pubmed/19524224
[2] Soybean isoflavone exposure does not have feminizing effects on men: a critical examination of the clinical evidence.
A 60-year-old man was referred to the endocrinology clinic for evaluation of bilateral gynecomastia of 6 months' duration. He reported erectile dysfunction and decreased libido. On further review of systems, he reported no changes in testicular size, no history of testicular trauma, no sexually transmitted diseases, no headaches, no visual changes, and no change in muscular mass or strength. Initial laboratory assessment showed estrone and estradiol concentrations to be 4-fold increased above the upper limit of the reference range. Subsequent findings from testicular ultrasonography; computed tomography of the chest, abdomen, and pelvis; and positron emission tomography were normal. Because of the normal findings from the imaging evaluation, the patient was interviewed again, and he described a daily intake of 3 quarts of soy milk. After he discontinued drinking soy milk, his breast tenderness resolved and his estradiol concentration slowly returned to normal.
Also there is a clear explanation of why so much plant products have hormonal disruptors in it, to modulate the fertility of herbivore, but it's not a story NutritionFact would tell you
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1474615/
Plants have physical and chemical mechanisms for defense from attack by animals. Phytochemical defenses that protect plants from attack by insects include antifeedants, insecticides, and insect growth regulators. Phytochemical options exist by which plants can modulate the fertility of the other major group of plant predators, vertebrate herbivores, and thereby reduce cumulative attacks by those herbivores. The success of such a defense depends upon phytochemical mimicry of vertebrate reproductive hormones. Phytoestrogens do mimic reproductive hormones and are proposed to be defensive substances produced by plants to modulate the fertility of herbivores.
Not really - for example most “manly-men” can agree heavy drinking decreases testosterone levels.
This is something that baffles me. The biggest, strongest mammals are herbivorous - elephant, bull, bison... Even the best carnivorous animals meditate for a few hours and seek divine help before messing with these guys.
Why is eating grass, not a manly-man activity?
If you want to make a statement like this, don't bother unless you have evidence.
It's also usually better to frame it around the evidence, like "this study from UCLA found that higher consumption of animal products led to decreased testosterone levels". This way, the discussion will be focused on the evidence or the conclusion you drew from it.
Does it? As far as I can tell high levels of saturated fat increases testosterone levels.
https://nutritionfacts.org/video/the-effect-of-animal-protei...
> After the intake of cow milk, serum estrone (E1) and progesterone concentrations significantly increased, and serum luteinizing hormone, follicle-stimulating hormone and testosterone significantly decreased in men
The first one seems to be about low carb vs high carb - where was the meat + carb vs no meat + high-carb comparison?
The second seems to be specific to milk and not animal products in general.