Research library
What the compound is, how it is tested and how to handle it in the lab. Written for researchers, checked against published sources, and free of dosing advice.
Quality & testing
A quality checklist for research peptide suppliers
Ten checks to run before you buy research peptides: company identity, batch-specific COAs, independent testing, labelling, cold chain and clear terms.
What 99% HPLC purity really means
How reverse-phase HPLC measures peptide purity, what the percentage means, which impurities it finds, and what it cannot tell you on its own.
How to read a peptide certificate of analysis
What each line on a peptide certificate of analysis means — identity, HPLC purity, peptide content, water, endotoxin — and the red flags to check.
Science
Single, dual and triple agonists compared
Semaglutide, tirzepatide and retatrutide compared by receptor targets, structure and status — a pharmacology comparison, not a treatment guide.
GIP, GLP-1 and glucagon receptors — a primer
A plain-language primer on the three receptors behind triple-agonist peptides: where GIP, GLP-1 and glucagon receptors sit and what they signal.