Why blends are harder to verify
HPLC separates a mixture into peaks, so a blend should show one main peak for each peptide in it. A certificate that gives a single "99% purity" figure for the whole vial does not tell you whether each peptide is there, or in what ratio.
The amount matters as much as the identity. A vial labelled as two peptides in equal amounts could hold very different amounts of each, and only a test that measures each one will show it.
What a good blend certificate shows
Stability in a mix
Each peptide breaks down at its own rate. A blend is only as stable as its least stable part, so storage advice for a blend should follow the most sensitive peptide in it.
Educational information only. Nothing here is medical advice, dosing guidance or a recommendation to use any substance. Research peptides are not approved medicines and are not for human or animal consumption. Speak to a qualified professional and follow the law where you are.
