Decapeptide-12
A synthetic 10-amino-acid peptide (CAS 137665-91-9) that inhibits tyrosinase, used in topical serums to reduce pigmentation and uneven tone. Evidence is from in-vitro work and small cosmetic studies.
Cosmetic ingredient.
Look it up on Wikipedia1 listing across 1 independently tested vendor, ranked by price per milligram after coupon codes anyone can use. Vendors you can only order from by message are hidden.
Daily price tracking started October 7, 2026; a price-history chart appears here once a few days have been collected.
| Vendor | Trust | Listing | Vials | Price | Per mg | |
|---|---|---|---|---|---|---|
Core Peptides #282 by metascore |
Metascore 70 medium confidenceFinnrick 76%PepIndex 24/100Bought vials 92% of label · 4 testsTitrateLab · PeptideBase · Peptide Critic · PeptideCheckedNo report for thisOnline checkout |
Decapeptide-12 – 200MG | 1 × 200 mg | $240.00 | $1.20 | Buy |
Mixing a 200 mg vial
What each common amount of bacteriostatic water gives you on a U-100 insulin syringe. Pick a vial size above to change it.
| Water | Strength | Per 10 units (0.1 mL) | Per unit |
|---|---|---|---|
| 1 mL | 200 mg/mL | 20,000 mcg | 2,000 mcg |
| 2 mL | 100 mg/mL | 10,000 mcg | 1,000 mcg |
| 3 mL | 66.667 mg/mL | 6,666.7 mcg | 666.67 mcg |
| 5 mL | 40 mg/mL | 4,000 mcg | 400 mcg |
Discussions elsewhere
Experiences and questions about Decapeptide-12 on other sites. Treat anecdotes with care.
Decapeptide-12: questions people ask
What is Decapeptide-12?
Cosmetic skin-brightening peptide. A synthetic 10-amino-acid peptide (CAS 137665-91-9) that inhibits tyrosinase, used in topical serums to reduce pigmentation and uneven tone. Evidence is from in-vitro work and small cosmetic studies.
How much does Decapeptide-12 cost?
The cheapest Decapeptide-12 from an independently tested vendor is $1.20 per mg (Core Peptides, Decapeptide-12 – 200MG, $240.00). Across 1 listings from 1 vendors the median is $1.20 per mg.
Where can I buy Decapeptide-12?
1 vendors tested by Finnrick sell Decapeptide-12. The cheapest per mg right now: Core Peptides ($1.20). 0 of them publish a lab report (COA) for Decapeptide-12; compare lab scores and reports in the table above before buying.
Is Decapeptide-12 FDA approved?
Cosmetic ingredient.