9 doctors weighed in:
How does soy affect testosterone?
9 doctors weighed in

Dr. Alvin Lin
Internal Medicine - Geriatrics
7 doctors agree
In brief: Jury is still out
Recall that soy (protein) has been recommended as an alternative to estrogen to treat menopause in women.
In men, estrogen (estradiol) decreases testosterone production. Therefore, if a guy ingests a lot of something that increases estrogen in his body, this could potentially decrease testosterone level. So while this is conjecture, read your ingredient labels carefully!

In brief: Jury is still out
Recall that soy (protein) has been recommended as an alternative to estrogen to treat menopause in women.
In men, estrogen (estradiol) decreases testosterone production. Therefore, if a guy ingests a lot of something that increases estrogen in his body, this could potentially decrease testosterone level. So while this is conjecture, read your ingredient labels carefully!
Dr. Alvin Lin
Dr. Alvin Lin
Thank
1 comment
Dr. Stephen Chinn
Soy is a source of phytoestrogens: although estrogens are "female" hormones, they can suppress testosterone production resulting in "low "T"". In fact, the original treatment for prostate cancer (aside from bilateral orchiectomy) was DES. It is noted, however, that doses higher than 3 mg are associated with increased cardiovascular risks.
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