Directory
Peptide directory
Every compound tracked in the PepIndex record, each carrying a score out of 100. That score combines two things: the strength of the published research located, and the quality of the evidence the market produces for it — the assayed purity, lot-to-lot consistency and third-party testing across the vendors that carry it. It is a score of evidence, not of the substance: nothing here rates a compound as safe, effective or suitable for any purpose.
Browse by research focus
Showing 5 of 5 compounds — Literature concerns skin and cosmetic formulation.
- S
Melanotan I
Dermatological93.9A synthetic analogue of alpha-melanocyte-stimulating hormone that stimulates melanin production, studied in relation to skin pigmentation. Its approved form is known as afamelanotide.
Skin & hair13 vendors12 certificates99.8% mean purityTier S evidence · Established popularity
- B
Melanotan II
Dermatological93.7A synthetic analogue of alpha-melanocyte stimulating hormone. It has been the subject of regulatory warnings in several countries regarding unlicensed sale.
Skin & hairHormonal19 vendors11 certificates99.8% mean purityTier B evidence · High popularity
- A
GHK-Cu
Dermatological91.6A copper-binding tripeptide found naturally in human plasma. It appears widely in topical cosmetic formulations and is also listed by research chemical vendors as a lyophilised powder.
Skin & hairHealing27 vendors36 certificates99.7% mean purityTier A evidence · High popularity
- B
SNAP-8
Dermatological61.3An eight–amino-acid peptide extension of the cosmetic peptide argireline, studied topically in relation to the appearance of expression lines.
Skin & hair4 vendors3 certificates99.5% mean purityTier B evidence · Niche popularity
- D
AHK-Cu
Dermatological42.2A copper-binding tripeptide (alanine-histidine-lysine) in the copper-peptide class, studied for effects on hair follicles and used as a cosmetic ingredient.
Skin & hair1 vendors0 certificatesTier D evidence · Niche popularity