Evidence supporting the use of: Sea vegetable (unspecified)
For the health condition: Hair (loss or thinning)

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Synopsis

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

Sea vegetables, such as kelp, nori, wakame, and other types of edible seaweed, have been used traditionally in various cultures, especially in East Asia, as part of the diet and sometimes as folk remedies for hair health. Historical and anecdotal reports suggest that their high iodine, mineral, and vitamin content may contribute to scalp and hair health. For example, seaweed is a good source of iodine, iron, zinc, omega-3 fatty acids, and certain polysaccharides, all of which are nutrients involved in healthy hair growth and maintenance. However, direct scientific studies linking sea vegetable consumption or topical application to prevention or treatment of hair loss or thinning are extremely limited. Most evidence remains indirect, with some studies suggesting that deficiencies in these minerals can contribute to hair loss, but not specifically that sea vegetables reverse or prevent the process. Therefore, while the traditional use for supporting hair health exists, strong scientific validation is lacking, and the evidence is primarily based on the nutritional profile of sea vegetables rather than controlled clinical trials.

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