Best peptides for hair growth
Peptides that target hair follicle health, thinning hair, and hair density.
Peptides for hair growth target several mechanisms — stimulating blood flow to follicles, providing building blocks for hair protein synthesis, and reducing inflammation around hair follicles. The evidence varies significantly between options.
One of the most researched peptides in cosmetic science. Naturally occurring in human plasma, GHK-Cu declines with age and is involved in wound healing, collagen synthesis, and potentially hair growth.
What evidence supports
- ✓promotes wound healing and tissue repair in multiple studies
- ✓stimulates collagen and glycosaminoglycan synthesis
- ✓may support hair follicle health and growth in some studies
Key concern: can cause a purging-like skin response initially
The most mainstream peptide supplement. Collagen broken down into small, absorbable peptides for oral use. Widely studied for skin, joint, and general connective tissue support.
What evidence supports
- ✓multiple randomized controlled trials show modest improvement in skin elasticity and hydration at 2.5–10g/day over 8+ weeks
- ✓some evidence supports improved joint comfort with consistent supplementation
- ✓bioavailability of hydrolyzed form is significantly better than whole collagen protein
Key concern: results are modest and gradual, not dramatic or immediate
Available in
A naturally occurring tripeptide found in human plasma, saliva, and urine. Concentrations decline significantly with age. GHK is the foundation peptide that, when bound to copper, forms the more well-known GHK-Cu. On its own, GHK has wound healing and gene expression modulation properties.
What evidence supports
- ✓gene expression studies show GHK can upregulate genes associated with tissue repair and downregulate inflammatory genes
- ✓stimulates collagen I and III synthesis in fibroblast cultures
- ✓promotes wound healing in animal models
Key concern: most research is on GHK-Cu (copper-bound form) rather than free GHK alone
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The information on this site is for educational and informational purposes only. It is not intended as medical advice and should not be used to diagnose, treat, or prevent any condition. Always consult with a qualified healthcare professional before starting any new supplement, peptide, or treatment protocol.