Insights
Notes on buying
and checking.
Guides on the parts of this trade that are hardest to verify from a website: what a certificate actually says, how the production route changes the paperwork, how to store what you bought, and how to check a supplier before the first order. Every figure is referenced to a primary source you can open.
Insights · Guide
How to read a peptide COA
Purity, net peptide content, counter-ion, water — the four numbers that decide what is actually in the vial, and the lines a good certificate of analysis states separately.
Read the guide 02Insights · Sourcing
Fermented or synthetic?
Fermentation-derived and synthetic actives differ in impurity profile, documentation and cost. These are the questions that separate the two in a quotation.
Read the guide 03Insights · Due diligence
Verifying a supplier
A 30-minute check of a peptide supplier before your first order: licence and scope, lot-level COA, sample-to-bulk consistency, third-party testing, payment terms.
Read the guide 04Insights · Handling
How to store a peptide
Freeze-dried peptides keep degrading after the water is gone. What residual moisture, temperature, light and pH actually do to a peptide — with primary sources.
Read the guide 05Insights · Specification
Net peptide content
A 98% pure peptide can be 84% peptide by mass. What net peptide content measures, how it is tested, and why the counter-ion changes the weighing.
Read the guideCatalogue
95 products,
each with a code.
Everything in these guides is applied on our own product pages — the specification tables, the COA notes and the declaration lists.