Evidence supporting the use of: Marine oil (unspecified)
For the body system: Nails

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Synopsis

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

Marine oil, typically referring to fish oil or oils derived from marine sources rich in omega-3 fatty acids (such as EPA and DHA), is used to support various aspects of human health, including the nail body system. The scientific basis for its use primarily rests on its essential fatty acid content. Nails, like skin and hair, benefit from adequate intake of essential fatty acids, which contribute to cell membrane health and moisture retention. Some studies have shown that omega-3 supplementation can help alleviate brittle nails and reduce inflammation in nail beds, especially in individuals with underlying deficiencies or inflammatory conditions. However, direct clinical trials specifically measuring improvements in nail strength or growth from marine oil supplementation are limited; most evidence is extrapolated from broader dermatological and nutritional studies. Overall, while there is a plausible biological mechanism and some supporting clinical observations, the strength of direct scientific evidence is moderate. Therefore, marine oil's use for nail health is supported, but more targeted research is needed to achieve higher evidence ratings.

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