Do soy peptides contain estrogen?

Soy peptide is a small molecular peptide compound obtained by enzymatic hydrolysis of soy protein. It is generally considered to have good bioactivity and is easily absorbed. Soy contains a compound called soy isoflavones, which belongs to phytoestrogens, also known as "plant estrogens" or "phytoestrogens," due to their structural similarity to estrogens in animals. These compounds can mimic the effects of estrogen at low concentrations. Soy isoflavones mainly exist in two forms: genistein and daidzein. These compounds can bind to estrogen receptors in the human body and produce some estrogen-like effects, especially when the body's estrogen levels are low, potentially exerting certain regulatory effects. However, their effects are generally much weaker compared to the estrogen naturally produced in the human body. Therefore, consumption of soy peptides or soy products usually does not cause significant changes in estrogen levels, unless in special circumstances, such as postmenopausal women or specific disease states.