Evidence supporting the use of: Keratin Peptides
For the body system: Nails

Links: Go back one page, Tool main page, Ingredients list, Health conditions list, Body systems list

Synopsis

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

Keratin peptides are fragments of the keratin protein, which is a primary structural component of hair, skin, and nails. The rationale for their use in supporting nail health is based on the fact that nails are composed largely of keratin. Scientific evidence supporting oral supplementation of keratin peptides for nail health is limited but emerging. A few small clinical studies have suggested that oral keratin peptide supplementation may improve nail strength, reduce brittleness, and enhance appearance. For example, a 2014 pilot study published in the journal "Scientific World Journal" found that women who took a keratin peptide supplement for 90 days reported subjective improvement in nail strength and appearance. However, these studies generally have small sample sizes and lack rigorous controls.

While the biological plausibility exists—since keratin is a key nail component—direct evidence of significant benefit in humans is modest, and more robust clinical trials are needed. The use of keratin peptides for nails is primarily justified by the growing body of preliminary scientific research, not by traditional use. In summary, there is some scientific support (evidence rating 2 out of 5), but the evidence is not yet strong or conclusive.

More about Keratin Peptides
More about Nails

Other body systems supported by Keratin Peptides

Hair
Nails
Skin

Products containing Keratin Peptides

We currently have no products on Caring Sunshine that contain this ingredient.