Evidence supporting the use of: Brewer's Yeast
For the health condition: Hair (loss or thinning)

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Synopsis

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

Brewer's yeast has been traditionally used as a dietary supplement to support hair health, particularly for hair loss or thinning. This tradition is largely based on its rich nutrient profile, as brewer's yeast contains B-vitamins (including biotin), protein, and trace minerals such as selenium and zinc, all of which are known to play roles in maintaining healthy hair. Historically, brewer's yeast was used as a general tonic to improve vitality and address various deficiencies, some of which can contribute to hair thinning if left unaddressed. Despite its longstanding use, direct scientific evidence specifically validating brewer's yeast as an effective treatment for hair loss is limited. While there are studies showing that deficiencies in certain nutrients found in brewer's yeast (notably biotin and zinc) can lead to hair loss, there is a lack of robust clinical trials directly linking brewer's yeast supplementation to improvements in hair growth or reduction in hair loss in otherwise healthy individuals. Most of the support for its use comes from tradition, anecdotal reports, and indirect evidence related to its nutritional content rather than from controlled scientific research.

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