Soy is unique in that it contains a high concentration of isoflavones, a type of plant estrogen (phytoestrogen) that is similar in function to human estrogen but with much weaker effects. Soy isoflavones can bind to estrogen receptors in the body and cause either weak estrogenic or anti-estrogenic activity.

Does soy isoflavones increase estrogen?

May reduce menopause symptoms

Studies suggest soy's beneficial role in menopause. In a review of 35 studies, soy isoflavone supplements raised estradiol (estrogen) levels in postmenopausal women by 14% ( 14 ).

What supplement reduces estrogen levels?

The most powerful supplement to lower estrogen levels is diindolylmethane (DIM) which reduces production of estrogen in the body, and enhances clearance through the liver.