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What a COA Should Include Identity confirmation Mass spectrometry confirming the correct molecular weight (~504 Da for Dihexa) Confirmation that the tested compound matches CAS 1401708-83-5 / PNB-0408 Purity testing HPLC purity reputable listings claim ~98% or higher An HPLC chromatogram showing a single dominant peak, not a cluster of unresolved peaks Contamination testing Residual solvent analysis (especially relevant given DMSO-based transdermal forms) Heavy metals screening where the supplier provides it How to Verify a COA Is Legitimate Match the batch

What the Evidence Actually Shows Tirzepatide has a genuinely strong evidence base by peptide standards large, randomized, controlled trials rather than anecdote

Whether delving into aging, muscle growth, skincare, or weight loss, the extensive range of peptides available offers researchers a treasure trove of unique properties

Bulletin de la Socit Chimique de Paris (in French)

Anestis A, Zoi I, Karamouzis MV

Users in different climates face distinct obstacles to peptide preservation