Evidence supporting the use of: Algae (unspecified)
For the body system: Hair

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Synopsis

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

Algae, a broad term encompassing various aquatic, photosynthetic organisms (such as spirulina, chlorella, and kelp), has a long-standing history of traditional use in supporting hair health. In several cultures, particularly in Asia, algae have been consumed as part of the diet or applied topically for purported benefits to skin and hair. The traditional rationale is that algae are rich in minerals (like iodine, iron, and zinc), vitamins (especially B vitamins), and essential fatty acids, all of which are associated with healthy hair growth and strength. However, scientific validation specifically linking unspecified algae to significant, consistent improvements in hair health is limited. Most available studies focus on specific types of algae and are often preliminary or conducted on animal models. While nutritional deficiencies in certain minerals or vitamins (often found in algae) can contribute to hair loss or poor hair quality, direct evidence that supplementing with algae improves hair health in otherwise healthy individuals is lacking. Thus, the use of unspecified algae for hair support remains primarily rooted in tradition, with limited but plausible mechanisms based on nutrient content, rather than robust scientific backing.

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