Ingredient or product comparison
How to Use Peptides for Hair Growth: Comparison by Mechanism, Application Method, and Preclinical Evidence
Selecting the right peptide depends on the underlying hair loss mechanism you're targeting. Androgenic alopecia (male/female pattern baldness) responds to different peptide pathways than telogen effluvium or cicatricial alopecia. GHK-Cu (Copper Peptide) Activa
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- Selecting the right peptide depends on the underlying hair loss mechanism you're targeting. Androgenic alopecia (male/female pattern baldness) responds to different peptide pathways than telogen effluvium or cicatricial alopecia.
- GHK-Cu (Copper Peptide)
- Activates tissue remodeling genes, inhibits 5-alpha reductase
- Topical post-microneedling or liposomal
- 0.1–2% w/v
- 58% increase in anagen-phase follicles (J Cosmet Dermatol 2019)
- Best-studied compound for androgenic alopecia. Copper chelation enhances bioavailability
- Thymosin Beta-4 Fragment
- Promotes angiogenesis and stem cell migration to follicle niche
- Subcutaneous injection or topical with DMSO carrier
- 0.5–5 mg/mL
- 42% increase in follicle diameter in murine models (Rejuvenation Res 2017)
- Requires deeper delivery than topical peptides. Microneedling mandatory
- Cartalax
- Telomere stabilization in dermal papilla cells
- Topical or intradermal injection
- 1–10 mcg per application
- Extends anagen phase duration by 22% in vitro (Adv Gerontol 2016)
- Emerging evidence. Fewer published human trials than GHK-Cu but strong mechanistic rationale
- Palmitoyl Tripeptide-1
- Stimulates collagen synthesis in follicular dermal sheath
- Topical in serum base
- 2–5% w/v
- Improved hair shaft thickness by 19% (Clin Cosmet Investig Dermatol 2020)
- More effective for hair quality than follicle density. Best as adjunct to primary peptide