Peptides researched for
Hair thinning and hair health
Keeping the hair you have
2 peptides · 3 studies
What people research this for
Thinning hair is common, and it can knock your confidence. People want to keep the hair they have and hope for thicker growth. Peptide research on hair is early, and most of it comes from lab work and small studies.
Researched for
- Thinning hair
- Hair shedding
- Scalp and follicle health
What the studies say so far
Most peptide hair studies were done on cells, in animals, or in small groups of people. Small studies can look promising and then fail to hold up in bigger ones. Approved hair loss treatments have much stronger evidence. Treat everything listed here as early research.
Peptides studied
Each peptide below has been studied in this area. The label shows how far that research has gone.
GHK-Cu
Early lab and animal researchResearch review · 2 studies
Study note. A 2007 lab study looked at a copper tripeptide on human hair follicles grown outside the body, and a 2015 review covers GHK skin biology. Human hair trials are lacking.
- The effect of tripeptide-copper complex on human hair growth in vitro. (opens in a new tab)
Pyo HK, Yoo HG, Won CH · Archives of pharmacal research · 2007 · PubMed
- GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. (opens in a new tab)
Pickart L, Vasquez-Soltero JM, Margolina A · BioMed research international · 2015 · PubMed
- The effect of tripeptide-copper complex on human hair growth in vitro. (opens in a new tab)
Collagen Peptides
Small early studies in peopleRandomized trial in people · 1 study
Study note. A 2026 randomized, placebo-controlled trial measured hair condition in people with damaged hair. It studied hair quality, not hair loss.
- Efficacy and Safety of Low-Molecular-Weight Collagen Peptide GT for Improving Hair Condition in Individuals with Damaged Hair: A Randomized, Double-Blind, Placebo-Controlled Trial. (opens in a new tab)
Kim TK, Oh J, Ha YS · International journal of stem cells · 2026 · PubMed
- Efficacy and Safety of Low-Molecular-Weight Collagen Peptide GT for Improving Hair Condition in Individuals with Damaged Hair: A Randomized, Double-Blind, Placebo-Controlled Trial. (opens in a new tab)
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