Soya and fertility…
Soya foods contain phytoestrogens, including isoflavones, which have weak oestrogen-like qualities. Because of this, some people think soya foods can affect male fertility. However, there is no scientific evidence to support this notion. A recent review of all the available research shows that neither soya foods, nor isoflavone supplements from soya, affect testosterone levels in men. This research adds to the large body of evidence supporting the role of soya as part of a healthy veggie diet.
Hamilton-Reeves et al., 2009. Clinical studies show no effects of soy protein or isoflavones on reproductive hormones in men: results of a meta-analysis. Fertility and Sterility. 94 (3) 997-1007.
About the author
Dr. Justine Butler
Justine joined Viva! in 2005 after graduating from Bristol University with a PhD in molecular biology. After working as a campaigner, then researcher and writer, she is now Viva!’s head of research and her work focuses on animals, the environment and health. Justine’s scientific training helps her research and write both in-depth scientific reports, such as White Lies and the Meat Report, as well as easy-to-read factsheets and myth-busting articles for consumer magazines and updates on the latest research. Justine also recently wrote the Vegan for the Planet guide for Viva!’s Vegan Now campaign.
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