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

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Minerals play a crucial role in supporting nail health, with particular scientific attention given to minerals such as zinc, iron, and selenium. Deficiencies in these minerals have been directly linked to various nail abnormalities. For example, zinc deficiency can cause white spots or Beau’s lines on the nails, while iron deficiency is a well-established cause of brittle or spoon-shaped nails (koilonychia). Selenium, though less commonly discussed, is also essential for the maintenance of healthy nails due to its role in antioxidant defense and cellular function. Numerous clinical studies and reviews have established these relationships, with evidence showing that correcting mineral deficiencies often leads to improvement in nail structure and strength. However, there is little evidence that mineral supplementation benefits individuals who are not deficient, and excessive intake can be harmful. While “mineral (unspecified)” is a broad term, and not all minerals are directly relevant to nail health, the scientific literature supports the use of specific minerals for addressing nail disorders related to their deficiencies. Thus, the use of certain minerals to support the nails body system is justified by scientific evidence, primarily in the context of deficiency correction rather than general supplementation.

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