Ingredient or product comparison
Comparison at a glance
GHK-Cu (copper tripeptide) Stimulating dermal papilla cells, prolonging/enlarging follicles, and raising VEGF signalling in lab and rodent models Preclinical (in-vitro human follicle + mouse); no monotherapy RCT Human data exists only in uncontrolled combinati
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- GHK-Cu (copper tripeptide)
- Stimulating dermal papilla cells, prolonging/enlarging follicles, and raising VEGF signalling in lab and rodent models
- Preclinical (in-vitro human follicle + mouse); no monotherapy RCT
- Human data exists only in uncontrolled combination protocols, so its independent effect is unproven
- TB-500 (thymosin beta-4 fragment)
- Activating hair-follicle stem cells and accelerating the hair-growth cycle in rodents and goats
- Preclinical / animal-dominant; one in-vitro human follicle study
- No human clinical trials for hair growth; almost all data is animal