Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Bovine collagen is commonly used in supplements marketed for nail health, and there is some emerging scientific evidence supporting its role. Collagen is a major structural protein in the body, including in the skin, hair, and nails. Hydrolyzed collagen derived from bovine sources is thought to provide amino acids necessary for the synthesis of keratin, the primary protein in nails.

Several small-scale clinical studies have investigated the impact of collagen supplementation on nail health. For example, a 2017 open-label study published in Journal of Cosmetic Dermatology found that daily ingestion of bioactive collagen peptides for 24 weeks increased nail growth rate and decreased the frequency of broken nails in participants. However, the study was small (25 participants) and lacked a placebo control.

Other studies and reviews, while generally positive, point out the need for more rigorous randomized controlled trials to confirm these effects. The hypothesized mechanism is that collagen peptides may stimulate the body’s own collagen and keratin production, thereby supporting nail strength and growth. Still, the evidence is limited and not yet robust; most data comes from manufacturer-sponsored research or studies with methodological limitations.

In summary, there is preliminary scientific support for the use of bovine collagen to improve nail health, but the evidence base is not strong. The current rating reflects promising but not definitive results, and further high-quality studies are needed.

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