Evidence supporting the use of: Brewer's Yeast
For the health condition: Acne

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Synopsis

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

Brewer's yeast (Saccharomyces cerevisiae) has been explored as a dietary supplement for supporting skin health, including the management of acne. Some scientific evidence exists, primarily from small clinical trials and observational studies. Notably, a double-blind, placebo-controlled study conducted in the 1960s found that a specific strain of Saccharomyces cerevisiae (CBS 5926) led to significant improvement in acne vulgaris compared to placebo. The hypothesized mechanisms include modulation of the gut microbiome, anti-inflammatory effects, and provision of B vitamins and trace minerals that support skin health. However, most studies are limited by small sample sizes, short durations, and inconsistent results.

Systematic reviews and more recent research have highlighted the lack of large, high-quality randomized controlled trials to firmly establish efficacy. While some dermatologists may recommend brewer's yeast based on these early studies, the overall quality of evidence remains low. Additionally, some individuals may experience adverse effects, such as bloating or allergic reactions, limiting its widespread recommendation. In summary, while there is some scientific basis for the use of brewer's yeast in acne, the supporting evidence is weak and insufficient to warrant routine use without further high-quality studies.

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