Are phytoestrogens harmful to the hormone balance?

Studies have shown that soya protein consumption has no significant effect on testosterone levels in men. This is because soya protein is rich in phytoestrogens. A 2010 study definitively concluded that consuming 20 grams of soya protein daily for 57 days did not affect testosterone levels in men (Hamilton-Reeves et al., 2010). Other studies investigating the influence of soya products on hormone levels in men also found similar results (Messina, 2010).

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