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What a Blend COA Should Include Identity Confirmation Both Peptides Mass spec confirming tesamorelin at 5,196 Da (44-residue GHRH analog with N-terminal hexenoyl modification) Mass spec confirming ipamorelin at 711.85 Da Per-peptide amino acid sequence verification Tesamorelin's hexenoyl modification specifically verified this distinguishes it from sermorelin (3,358 Da, no hexenoyl) Purity Testing Both Peptides HPLC purity at 98%+ for each peptide individually Two HPLC chromatograms, each showing a single dominant peak Contamination Testing Endotoxin levels Residual solvent analysis Heavy metals screening How to Verify a Blend COA Is Legitimate Two separate test reports per-peptide mass spec and HPLC, not a combined "blend purity" Third-party lab Janoshik, MZ Biolabs, Colmaric most-cited Verifiable task number at the lab's website Recent date (within 6 months) Both molecular weights confirmed 5,196 Da AND 711.85 Da Hexenoyl modification verified on the tesamorelin component Red Flags to Avoid Single combined COA without per-peptide breakdown Only in-house testing Prices below $5/mg total likely sermorelin substituted for tesamorelin Mass spec showing ~3,358 Da in the GHRH-analog peak that's sermorelin, not tesamorelin Vague "GHRH/ipamorelin" labeling without specifying tesamorelin vs sermorelin vs CJC-1295 No contact information or cryptocurrency only No return or reship policy Choosing the Right Vial Size The 14-21 Day Stability Rule (Tesamorelin's Tighter Window) Tesamorelin reconstituted with bacteriostatic water and refrigerated is documented stable for roughly 14-21 days shorter than the 28 days for ipamorelin
