Evidence supporting the use of: Blend (Amino Acid/Protein)
For the body system: Nails

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Synopsis

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

Scientific evidence supports the use of amino acid/protein blends for supporting the nails body system. Nails are composed primarily of keratin, a fibrous structural protein, and their health is inherently linked to adequate protein and specific amino acid intake. Several studies have demonstrated that protein deficiency can lead to brittle, weak, or slow-growing nails. Amino acids such as cysteine (a key component of keratin) are particularly important for nail strength and growth. Clinical research shows that supplementation with certain amino acids (notably cystine and methionine) may improve nail quality and growth rate in individuals with deficiencies or poor nail health. Furthermore, biotin (a B-vitamin involved in protein synthesis) is often included in protein blends and has been shown in multiple studies to increase nail thickness and reduce splitting. While the evidence is strongest for individuals with poor dietary protein, some benefit may extend to the general population, although results can vary. Overall, the scientific consensus is that adequate protein and amino acid intake is essential for optimal nail health, justifying the use of amino acid/protein blends for supporting the nails body system.

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