Evidence supporting the use of: Spirulina
For the health condition: Hair (loss or thinning)

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Synopsis

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

Spirulina, a blue-green algae, has been traditionally used as a nutritional supplement owing to its rich content of protein, vitamins (notably B vitamins), minerals (such as iron), and antioxidants. The traditional use of spirulina for hair health is largely based on its overall nutritional value and anecdotal claims that it can strengthen hair, improve scalp health, and possibly reduce hair thinning. Some proponents suggest that the high protein content might support keratin production, while iron and certain vitamins could theoretically benefit hair follicles, especially in cases where deficiencies contribute to hair loss.

However, scientific evidence specifically linking spirulina supplementation to the prevention or reversal of hair loss is limited and of low quality. Only a few small-scale studies and animal research have explored spirulina’s potential benefits for hair, mostly focusing on its antioxidant and anti-inflammatory properties. These studies generally lack rigorous methodology, sufficient sample sizes, or direct clinical relevance. While spirulina may help address hair loss related to malnutrition or micronutrient deficiencies, there is no robust clinical evidence that it directly treats or prevents hair thinning or loss in otherwise healthy individuals. Thus, while spirulina’s use for hair health is rooted in traditional nutritional practices, its specific efficacy for hair loss remains largely unproven.

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