Evidence supporting the use of: Collagen
For the health condition: Fingernails (weak or brittle)

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Synopsis

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

Collagen supplementation for the support of fingernail health, particularly for weak or brittle nails, is a practice supported by limited scientific evidence. Collagen is a structural protein found abundantly in the body, including in the skin, hair, and nails. The rationale for its use is that oral collagen peptides may provide the amino acids necessary for the body to build and strengthen keratin-based structures like nails. A small number of clinical studies and case reports suggest potential benefits. For instance, a 2017 open-label study by Hexsel et al. investigated the effects of daily supplementation with bioactive collagen peptides in women with brittle nails. Over 24 weeks, participants experienced increased nail growth rate, reduced frequency of broken nails, and improved nail appearance. However, the study was not placebo-controlled, and the sample size was limited. Other research, while promising, faces similar methodological limitations. Systematic reviews and expert consensus generally agree that, while preliminary data points to a possible positive effect, the overall quality of evidence is low. More rigorous, large-scale, placebo-controlled trials are needed to confirm effectiveness and optimal dosing. In summary, while there is some emerging scientific support for collagen supplementation in improving nail strength and growth, the evidence remains preliminary and should be interpreted with caution.

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More about Fingernails (weak or brittle)

Other ingredients used for Fingernails (weak or brittle)

alfalfa
biotin
collagen
gelatin
iron
milk
moringa
silicon
keratin
vitamin E
zinc