Articles
Plain-language comparisons, explainers and the legal status of popular peptides. Every claim is numbered to its source.
Compounded vs approved GLP-1 drugs: what is the difference?
Approved semaglutide and tirzepatide are FDA-reviewed; compounded versions are not. How the 503A and 503B rules work and what changed after the shortages.
How to judge the evidence behind a peptide claim
Why a randomised trial in people outweighs a study in rats, what approval does and does not tell you, and how PeptoKing grades the evidence for each peptide.
Is BPC-157 legal? Status in the US, UK, EU, Australia and Canada
BPC-157 is not an approved medicine in the US, UK, EU, Australia or Canada. What each regulator says about selling it, and its status in sport.
Retatrutide vs tirzepatide: what the trials show and what they don't
Retatrutide is an unapproved triple agonist; tirzepatide is approved. How they work, trial results, why cross-trial numbers mislead, and online product risks.
Semaglutide vs tirzepatide: what the SURMOUNT-5 head-to-head trial showed
Semaglutide (Wegovy, Ozempic) vs tirzepatide (Zepbound, Mounjaro): how they work, approvals, the SURMOUNT-5 trial, heart outcome data and label warnings.
What does 'research use only' mean on peptides?
A 'research use only' label is not an approval. What regulators in the US, Canada, Australia and the UK say about it, and what product testing has found.