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Buying and sourcing

How to read a supplier, a label, and a certificate of analysis before you spend anything.

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Buying and sourcing

Research use only is a sentence about the seller, not the product

It is the most common phrase in this market and one of the most widely misread. It describes intent, not quality.Reviewed 5 minRegulatory sources · 3 sourcesBPC-157TB-500EpithalonBuying and sourcing

FDA-approved describes a product and a use, not a molecule

Nineteen compounds on this site have an approved product. That sentence means something much narrower than it sounds.Reviewed 6 minRegulatory sources · 4 sourcesSemaglutideSermorelinPT-141Buying and sourcing

Reading a certificate of analysis: what testing does and does not prove

A laboratory report is a statement about a sample, not a verdict on a product.Reviewed 5 minRegulatory sources · 6 sourcesSemaglutideTirzepatideBPC-157Buying and sourcing

Three of the thirteen approved peptides here are no longer marketed

An approval does not expire when a product leaves the market. That is why a badge saying FDA-approved can sit on something you cannot be prescribed.Reviewed 6 minRegulatory sources · 3 sourcesPramlintideSermorelinGonadorelinBuying and sourcing

The adverse-event record for unapproved research peptides is nearly empty

An empty file is not a clean record. It is a record of a reporting system that has almost no way to reach these products.Reviewed 8 minRegulatory sources · 11 sourcesBPC-157TB-500Ipamorelin+5Buying and sourcing

The FDA compounding lists and peptides: what changed in 2023 and after

Three different mechanisms get reported as one ban. They are not the same, and the difference decides what the record actually says.Reviewed 9 minRegulatory sources · 7 sourcesBPC-157TB-500GHK-Cu+18Buying and sourcing

What a GLP-1 actually costs through each legal channel

The spread between the cheapest and dearest published price for the same molecule is roughly ninefold, and which one you pay is decided by paperwork rather than by pharmacology.Reviewed 7 minSecondary sources · 8 sourcesSemaglutideTirzepatideBuying and sourcing

Why the same molecule has four prices at once

The prices are not competing estimates of one true value. They are outputs of four separate systems that happen to reference the same molecule.Reviewed 6 minSecondary sources · 7 sourcesSemaglutideTirzepatideBuying and sourcing

What a certificate of analysis does not test for

An absent test is not a passed test. Here is the list of things a typical two-line certificate is silent about.Reviewed 7 minRegulatory sources · 8 sourcesSemaglutideTirzepatideBPC-157Buying and sourcing

Third-party testing: what HPLC and mass spectrometry each show

HPLC answers how much of what the detector saw. Mass spectrometry answers what something weighs. Neither answers the other's question.Reviewed 7 minRegulatory sources · 6 sourcesSemaglutideTirzepatideBPC-157Buying and sourcing

Lot numbers and traceability: the field that matters most

Every other field on a label describes the container. The lot number connects it to everything else.Reviewed 7 minRegulatory sources · 8 sourcesSemaglutideTirzepatide