Synopsis

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

Bovine protein, especially in the form of hydrolyzed collagen derived from bovine sources, has been studied for its role in supporting nail health. Collagen is a primary structural protein in the body, contributing to the strength and resilience of connective tissues, including those found in nails. Several clinical studies have explored the effects of collagen peptide supplementation on nail growth and brittleness. For example, a 2017 open-label study published in the Journal of Cosmetic Dermatology reported that daily ingestion of bioactive collagen peptides significantly improved nail growth rate and reduced symptoms of brittle nails in participants over a 24-week period. The proposed mechanism is that the amino acids provided by bovine collagen peptides support keratin synthesis, which is essential for nail structure.

However, evidence is not overwhelmingly robust; most studies are small and often lack placebo controls or blinding. While there is some reproducibility of results across different studies, the overall quality of the evidence is moderate. Nevertheless, the use of bovine protein, via collagen peptides, is supported by a growing scientific rationale and modest clinical evidence for improving nail strength and reducing brittleness. This justifies a mid-level rating for scientific support, though more large-scale, high-quality trials are necessary to confirm efficacy and optimal dosing.

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