Ingredient or product comparison
Best Peptides for Hair Growth: Mechanism Comparison
GHK-Cu (Copper Peptide) Activates Wnt/β-catenin pathway; increases dermal papilla cell proliferation by 230% Topical solution (1–5 mM) 1 mL daily to affected areas 12–16 weeks Strongest topical evidence. Low side effect profile and well-tolerated in clinical t
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- GHK-Cu (Copper Peptide)
- Activates Wnt/β-catenin pathway; increases dermal papilla cell proliferation by 230%
- Topical solution (1–5 mM)
- 1 mL daily to affected areas
- 12–16 weeks
- Strongest topical evidence. Low side effect profile and well-tolerated in clinical trials
- Thymosin Beta-4 (TB-500)
- Extends anagen phase by blocking inflammatory catagen triggers; sequesters actin to prevent immune cell infiltration
- Subcutaneous injection or topical with penetration enhancer
- 2–5 mg twice weekly (SC)
- 8–12 weeks
- Most effective for inflammatory hair loss patterns. Requires injection for reliable systemic levels
- MK-677 (Ibutamoren)
- Stimulates pulsatile GH release, increasing circulating IGF-1 which activates follicular stem cell differentiation
- Oral capsule or solution
- 12.5–25 mg once daily
- 12–20 weeks
- Systemic approach with broader effects. Useful when combined with topical peptides but slower onset
- GHK (without copper)
- Mild anti-inflammatory and collagen synthesis support
- Topical serum
- Variable (often 0.5–2 mM)
- 16–24 weeks
- Weaker than copper-bound form. Copper ion is required for full receptor activation