Evidence supporting the use of: Brewer's Yeast
For the body system: Hair

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Synopsis

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

Brewer's yeast is sometimes used to support hair health, based on its rich nutritional profile. It is a natural source of B vitamins (including biotin, riboflavin, niacin, and folic acid), protein, and trace minerals such as selenium and zinc. Several of these nutrients are involved in cellular metabolism and the health of skin, hair, and nails. Scientific validation for brewer's yeast specifically improving hair growth or preventing hair loss is limited; most evidence is indirect and stems from the role of B vitamins and trace minerals in general hair health. For example, biotin deficiency has been linked to hair loss, and supplementation may help in cases of deficiency, but robust clinical trials using brewer's yeast specifically for hair growth are lacking. Some small studies and anecdotal reports suggest that supplementation may improve hair texture or reduce shedding, likely due to addressing minor nutritional gaps. However, there is no strong, direct scientific evidence that brewer's yeast supplementation has a significant effect on hair growth or health in otherwise healthy individuals with a balanced diet. As such, the use of brewer's yeast for hair health is best supported by its nutritional content rather than by clinical trial data.

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