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Verification

Every vial has a lot number.
Here is what is in it.

Independent testing has found gray-market peptides at 5–75% of label claim. This is how you tell the difference: enter the lot printed on your label.

Try a sample: ,

What each test is looking for

Identity — LC-MS/MS
Confirms the molecule is the sequence on the label, and not a different peptide.
Potency — HPLC
Measures how much active peptide is actually present, against a 99.0% specification.
Endotoxin — LAL
Detects bacterial breakdown products that cause fever reactions when injected.
Sterility — USP <71>
Confirms no viable microorganisms are present.
Particulates — USP <788>
Counts sub-visible particles, which matter for anything injected.
Residual solvents — ICH
Confirms manufacturing solvents such as TFA and DMF are below limits.
Chiral purity
Detects mirror-image amino acids, which regulators now expect every synthetic peptide filing to address.

Not sure how to read a certificate of analysis? We wrote a guide.