Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Soy is often discussed for prostate health due to its rich content of isoflavones such as genistein and daidzein, which are phytoestrogens. Epidemiological studies have observed that populations consuming higher amounts of soy (such as in many Asian countries) have lower rates of prostate cancer, sparking scientific interest in soy as a protective factor for the prostate. Several laboratory and animal studies suggest that soy isoflavones may exert anti-androgenic and anti-inflammatory effects on prostate tissue, potentially inhibiting cancer cell growth.

However, randomized controlled trials in humans provide mixed results. Some clinical studies indicate a modest reduction in prostate-specific antigen (PSA) levels and a possible reduction in the risk of developing prostate cancer among men consuming soy or isoflavones. A 2018 meta-analysis published in "Nutrients" found that soy intake was associated with a slightly reduced risk of prostate cancer, but the evidence was not strong enough to make definitive recommendations. The American Cancer Society and other major health organizations do not currently endorse soy supplements as a primary or proven method for supporting prostate health or preventing prostate cancer.

In summary, while there is some scientific rationale and preliminary evidence supporting soy's use for prostate health, the overall quality and consistency of human data is moderate at best. Thus, it rates a 2 out of 5 for evidence strength in this context.

More about Soy
More about Prostate

Other ingredients that support Prostate

Other body systems supported by Soy

Products containing Soy