Evidence supporting the use of: Seaweed (unspecified)
For the health condition: Acne

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Synopsis

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

Seaweed has traditionally been used in various cultures, particularly in East Asia, for promoting skin health and treating skin conditions, including acne. Historical records and traditional medicine practices suggest the topical or dietary use of seaweed for its purported anti-inflammatory and detoxifying effects on the skin. Seaweed is rich in minerals, vitamins (such as vitamin A and C), antioxidants, and polysaccharides, which are believed to help maintain skin barrier function and reduce inflammation—factors relevant to acne management.

However, while traditional use is well-documented, scientific evidence supporting seaweed's effectiveness for acne is limited and mostly preliminary. Some laboratory studies have demonstrated antimicrobial and anti-inflammatory properties of various seaweed extracts, which could theoretically benefit acne-prone skin. Small-scale in vitro studies have shown that certain compounds in seaweed may inhibit the growth of Cutibacterium acnes, the bacteria associated with acne, and reduce inflammation.

Despite these findings, robust clinical trials in humans are lacking, and therefore, the use of seaweed for acne remains primarily grounded in traditional practice rather than strong scientific validation. As such, while seaweed is commonly included in traditional remedies and some modern skincare products, its efficacy for treating acne has not been conclusively demonstrated in clinical settings.

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