Every Research Peptide USA-Sourced & Synthesized in the USAPeptide Lots Tested by an ISO/IEC 17025-Accredited USA Lab99%+ HPLC-Verified Peptide PurityLot-Specific COAs Published in Our COA LibrarycGMP Production — Black Label PeptidesFree Shipping on Orders $100+Most Orders Ship Within 24 Hours
Every Research Peptide USA-Sourced & Synthesized in the USAPeptide Lots Tested by an ISO/IEC 17025-Accredited USA Lab99%+ HPLC-Verified Peptide PurityLot-Specific COAs Published in Our COA LibrarycGMP Production — Black Label PeptidesFree Shipping on Orders $100+Most Orders Ship Within 24 Hours
Each peptide lot is analyzed by an independent, USA-based laboratory — not by us — so the result is impartial.
ISO/IEC 17025 accredited
Testing is performed at labs accredited to the international standard for testing competence.
99%+ peptide purity
If an independent, qualified lab finds a peptide below its COA-stated purity, we issue a full refund, ship a free replacement, and reimburse your verified testing cost.
How to verify your vial
Step 1
Match the lot
vial label ↔ certificate lot/batch number
Step 2
Check purity
reported HPLC purity vs the product spec
Step 3
Confirm identity
mass-spec (MS) result matches the compound
Verified
Research with confidence
each peptide lot is covered by the guarantee
Independent testing. If a qualified accredited laboratory finds a product below its COA-stated purity, The Precisely Promise applies — submit results within 30 days of delivery. See the Refund & Return Policy.
Browse certificates by product
Download the current Certificate of Analysis for each product and lot below.
Every peptide lot we ship is independently verified by a USA-based, ISO/IEC 17025-accredited laboratory. Browse and open any certificate below.
