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Mass spectrometry

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A lab technique that confirms a peptide’s molecular weight, verifying it is the right molecule. It is usually reported alongside HPLC purity on a COA.

Mass spectrometry answers a different question than a purity assay: it confirms the molecule weighs what the intended peptide should weigh, guarding against a wrong or mislabelled sequence. That is why a COA usually pairs it with HPLC purity, one verifying identity and the other quantifying impurities. Neither figure, on its own, tells a person the exact peptide mass to enter into a dosing calculation.

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Peptide dosage guideThe reconstitution formula and a worked example.Peptide libraryProfiles, dosing and reconstitution for 100+ compounds.

More glossary terms

MelanocortinMicrogram (mcg)Milligram (mg)Needle gaugeNet peptide contentNootropicPeptide bondPeptide sequencePituitary glandPulsatile releaseReceptorReconstitution

Educational reference only — not medical advice. Always follow the guidance of a qualified healthcare professional.