Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Selenium yeast is a dietary supplement form of selenium, an essential trace mineral, in which selenium is organically bound to yeast. Scientific evidence supports the role of selenium in male reproductive health, particularly in spermatogenesis and testosterone metabolism. Selenium acts as a cofactor for antioxidant enzymes such as glutathione peroxidase, which protects sperm cells from oxidative stress, a key factor in male infertility. Several clinical studies have indicated that selenium supplementation can improve sperm motility, morphology, and overall semen quality, especially in men with low selenium status or infertility issues. For example, a randomized controlled trial published in the "Journal of Urology" (2009) found that selenium (as selenium yeast) combined with vitamin E improved sperm motility and morphology in infertile men. However, the effect size varies among populations, and not all studies show significant benefits. The World Health Organization recognizes selenium as important for male fertility, but emphasizes that supplementation should be targeted to those with deficiency or suboptimal status, as excess selenium may have adverse effects. While selenium yeast is commonly used as a supplement for this purpose, more large-scale, high-quality studies are needed to determine optimal dosing and long-term benefits. In summary, there is moderate scientific validation for using selenium yeast to support the male reproductive system, particularly in men with low selenium levels or fertility concerns.

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