Synopsis

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

Selenium yeast is a form of selenium, an essential trace mineral that is incorporated into yeast cells. Selenium plays a critical role in various bodily functions, including antioxidant defense and immune support. Its relevance to nail health is primarily linked to its role in the synthesis of selenoproteins, which help protect cells—including those involved in nail growth—from oxidative damage. Some observational studies have noted that selenium deficiency can manifest as changes in nail appearance, such as discoloration, brittleness, or white spots. However, these symptoms are more commonly seen in cases of clear, clinical deficiency, which is rare in developed countries. Direct scientific evidence supporting selenium yeast supplementation specifically for enhancing or supporting healthy nails in the general population is limited. Most available data come from broader research on selenium’s effect on skin, hair, and nails, rather than targeted clinical trials on nails alone. In summary, while there is a scientific rationale for adequate selenium intake to maintain overall nail health, robust clinical evidence for the use of selenium yeast to specifically support the nail body system is limited. As such, supplementation may be most beneficial in individuals with a demonstrated selenium deficiency, rather than as a general strategy for improving nail health.

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