Evidence supporting the use of: Sulfur compounds (unspecified)
For the health condition: Hair Care (general)

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Synopsis

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

Sulfur compounds have a long and scientifically supported history in hair care, primarily due to their role in the structure and health of hair. Hair is largely composed of keratin, a protein rich in the sulfur-containing amino acid cysteine. The disulfide bonds formed by sulfur atoms between keratin molecules are crucial for hair strength and elasticity. Topical sulfur has been used in medicated shampoos and treatments for conditions such as dandruff, seborrheic dermatitis, and certain fungal infections of the scalp. Clinical studies support sulfur’s keratolytic (removing dead skin) and antifungal properties, making it effective for these scalp conditions, which can indirectly improve hair health when underlying scalp issues are addressed.

Additionally, sulfur is believed to support hair growth, as it is essential for the synthesis of methionine and cysteine, both important for hair structure. Some over-the-counter treatments and dietary supplements include sulfur or sulfur-containing compounds (like MSM, methylsulfonylmethane) for this reason. However, while there is scientific rationale and some supportive data, robust clinical trials directly proving hair growth benefits in healthy individuals are limited. Overall, sulfur’s use in hair care is validated for scalp and hair health, particularly in treating certain dermatological conditions, but evidence for direct hair growth promotion is less substantial.

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