Taking collagen supplements can help keep your hair roots strong and healthy by protecting them from damage. This protection may also help your hair keep its natural color longer.
Evidence from Studies
Supporting (0)
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Contradicting (3)
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Effect of Reducing Pigmentation by Collagen Peptide Intake: A Randomized, Double-Blind, Placebo-Controlled Study
The study examined skin lightening rather than hair health or darkening, finding that collagen actually reduces skin pigmentation. It does not measure hair follicles, oxidative stress, or the hair-pigmenting effects claimed.
AP collagen peptides (APCPs) promote hair growth by activating the GSK‐3β/β‐catenin pathway and improve hair condition
The study shows collagen peptides help hair grow thicker and healthier, but it does not test whether they protect against cell damage or change hair color.
The study says that eating collagen or collagen pills won't actually build new tissue or improve hair and skin, directly going against the idea that they boost hair health and color.
Gold Standard Evidence Needed
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