Janoshik Lab Verified

COA Checker

Every batch we sell is independently tested for purity and identity. Search by product or batch number below to view the current Certificate of Analysis — or check a past batch.

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Tested by Janoshik Analytical

Every Certificate of Analysis on this page is issued by Janoshik, an independent third-party laboratory specializing in peptide and research chemical analysis. Results are based on their own HPLC/MS testing — not self-reported by us.

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Featured Products

Popular research peptides from our catalog

Janoshik Verified
Weight Management
Retatrutide
99.8 HPLC Purity
Price range: $60.00 through $100.00 Select options This product has multiple variants. The options may be chosen on the product page
Janoshik Verified
Weight Management
Semaglutide
99.6% HPLC Purity
Price range: $35.00 through $40.00 Select options This product has multiple variants. The options may be chosen on the product page
Janoshik Verified
Weight Management
Tirzepatide
99.7% HPLC Purity
Price range: $40.00 through $55.00 Select options This product has multiple variants. The options may be chosen on the product page
Janoshik Verified
Anti-Aging & Longevity
GHK-Cu
99.5% HPLC Purity
Price range: $75.00 through $95.00 Select options This product has multiple variants. The options may be chosen on the product page