Built for researchers.
Verified for results.
We supply professional-grade cosmetic peptide powders to formulators, cosmetic chemists, and independent researchers across the United States and Europe.
Our Mission
The cosmetic raw ingredient market is flooded with underdosed, mislabeled, and poorly documented actives. We started cusk20 to fix that — sourcing only from GMP- and ISO-certified manufacturers, verifying every batch with independent HPLC analysis, and publishing the data. No marketing claims without evidence. No purity shortcuts.
Our Quality Standards
HPLC-Verified Purity
Every batch is tested by HPLC chromatography. We accept nothing below 99% purity. The COA is available for every product upon request.
GMP & ISO Certified
Our manufacturing partners operate under GMP and ISO-certified facilities — the same standards used by pharmaceutical producers worldwide.
Batch-Specific COA
Every order ships with a reference to its batch COA. Lot number, test date, purity result, and analytical method — all documented and available.
Secure Packaging
All powders are packed in pharmaceutical-grade, UV-protected, resealable aluminum foil bags to prevent oxidation during transit and storage.
Who We Supply
Our customers include:
- Independent cosmetic formulators and DIY skincare creators
- Cosmetic chemists and contract manufacturers
- Estheticians and professional skincare practitioners
- Researchers studying peptide bioactivity in cosmetic applications
Professional Use Notice
All products sold by cusk20 are raw cosmetic active ingredients intended for professional formulation use only. They are not finished cosmetic products and are not intended for direct skin application without proper formulation. Keep out of reach of children.
Contact Us
Questions about a product, batch documentation, or formulation support?
Email: cusk20@proton.me