Soy’s Protein Benefits Versus Man-Breast Myths

Does consuming soy cause breast tissue growth in men? Does it lead to a decrease in testosterone?

Gynecomastia is the enlargement of breast tissue in men and boys due to hormone imbalance.

In 2008, it was reported that a Texas man’s gynecomastia was linked to excessive soy intake. In 2020, a similar case involving an eight-year-old boy also made headlines.

How could eating or drinking soy trigger this condition? Do soy products pose a broad threat to men?

Over the years, much research has been done into the link between soy intake and health. Some of the studies span decades and tens of thousands of men and women. What difference do they show in the heart health of those who eat the most soy versus those who eat the least?

There is an increasingly broad spectrum of soy products—from edamame to soy protein milk. How soy is consumed also differs broadly across cultures. What relative health risks and benefits do these differences in consumption bring?

On Vitals Signs, host Brendon Fallon probes the soy–male breast growth myth, and weighs the risks and benefits of soy consumption.

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Featured studies/reports:

Effect of soymilk consumption on serum estrogen and androgen concentrations in Japanese men
https://pubmed.ncbi.nlm.nih.gov/11303585/

Effect of protein source and resistance training on body composition and sex hormones
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1997115/

An unusual case of gynecomastia associated with soy product consumption
https://pubmed.ncbi.nlm.nih.gov/18558591/

Prepubescent unilateral gynecomastia secondary to excessive soy consumption
https://pubmed.ncbi.nlm.nih.gov/33818045/

Soy protein isolates of varying isoflavone content exert minor effects on serum reproductive hormones in healthy young men
https://pubmed.ncbi.nlm.nih.gov/15735098/

Neither soy nor isoflavone intake affects male reproductive hormones: An expanded and updated meta-analysis of clinical studies
https://pubmed.ncbi.nlm.nih.gov/33383165/

Isoflavone Intake and the Risk of Coronary Heart Disease in US Men and Women
https://www.ahajournals.org/doi/full/10.1161/CIRCULATIONAHA.119.041306

Red meat intake and risk of coronary heart disease among US men: prospective cohort study
https://www.bmj.com/content/371/bmj.m4141

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Vital Signs’ host, guests, and contributors offer general information on improving health and wellness. This is not intended as diagnosis or medical advice. You should consult your medical doctor or holistic doctor before enacting any suggested strategies for health and wellness improvement, including those in relation to preventing or treating specific diseases featured on this program.

Views expressed in this video are opinions of the host and guests, and do not necessarily reflect the views of The Epoch Times.

Views expressed in this article are the opinions of the author and do not necessarily reflect the views of The Epoch Times. Epoch Health welcomes professional discussion and friendly debate. To submit an opinion piece, please follow these guidelines and submit through our form here.