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Soy beans and soy milk. Soy boy is a pejorative term sometimes used in online communities to describe men perceived to be lacking masculine characteristics. The term bears many similarities and has been compared to the slang terms cuck (derived from cuckold), nu-male and low-T ("low testosterone") – terms sometimes used as insults for male femininity in the manosphere.
That left people concerned that phytoestrogens, like those found in soy, would put you at increased risk of breast cancer, as estrogen activity can act as a catalyst for cancer growth.
According to one study of nine common phytoestrogens in a Western diet, foods with the highest relative phytoestrogen content were nuts and oilseeds, followed by soy products, cereals and breads, legumes, meat products, and other processed foods that may contain soy, vegetables, fruits, alcoholic, and nonalcoholic beverages.
[152] A 2010 review showed that neither soy foods nor isoflavone supplements alter measures of bioavailable testosterone or estrogen concentrations in men. [193] Soy consumption has been shown to have no effect on the levels and quality of sperm. [194]
Men with aromatase deficiency and estrogen insensitivity syndrome, and hence estrogen deficiency, appear to have normal sexual desire, function, and activity. [22] [21] However, estradiol supplementation in some men with aromatase deficiency increased sexual desire and activity but not in other men with aromatase deficiency.
Equol (4',7-isoflavandiol) is an isoflavandiol [1] estrogen metabolized from daidzein, a type of isoflavone found in soybeans and other plant sources, by bacterial flora in the intestines. [2] [3] While endogenous estrogenic hormones such as estradiol are steroids, equol is a nonsteroidal estrogen. Only about 30–50% of people have intestinal ...