Synopsis

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

Bovine, particularly in the form of bovine collagen, is increasingly used in supplements aimed at supporting the health of nails. Collagen is a structural protein found in connective tissues, including skin, hair, and nails. Scientific interest in using bovine collagen for nail health centers on its amino acid profile, which includes glycine, proline, and hydroxyproline—key components in the synthesis of keratin, the primary protein in nails. Several clinical studies suggest potential benefits: a 2017 open-label trial published in the Journal of Cosmetic Dermatology found that daily supplementation with bioactive collagen peptides (from bovine sources) improved nail growth rate and reduced the frequency of broken nails over a 24-week period. Another study in 2019 reported similar findings, with participants experiencing increased nail hardness and decreased brittleness.

However, while these findings are promising, the current body of evidence is still limited in scope and sample size, and most available research is industry-funded, which could introduce bias. Furthermore, not all studies distinguish between collagen from different animal sources. Nonetheless, the plausible mechanism—providing essential amino acids for keratin production—and the growing number of supportive clinical studies give a moderate scientific basis (rated 3 out of 5) for the use of bovine collagen in supporting nail health.

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