Why we built Yopepi
Yopepi was built after its founder noticed a growing number of research peptide suppliers and substantial differences in listed prices. Its purpose is to make those listings easier to compare by nominal vial size and price per mg, with links back to the supplier.
Observed data and supplier claims
Catalogue prices come from supported public supplier sources. Each offer retains its observation date and original supplier wording where available. A source check attempt is not necessarily a successful new observation. Coverage is incomplete and can change.
Supplier location, purity and testing statements are claims unless the site explicitly describes the evidence reviewed. Directory inclusion is not endorsement. A shared display family does not establish equivalent formulation.
Who prepares the guides
Guides are published by Yopepi to explain how its comparison service works. They are not clinical advice or independent laboratory certification. We do not claim medical or analytical credentials for the author. Numerical worked examples are labelled illustrative and are kept separate from saved supplier prices.
Dates and corrections
Offer dates refer to source observations. Editorial dates refer to substantive changes to the guide, not to every site deployment or daily catalogue refresh. If a price, name or explanation appears incorrect, use the report form with the relevant URL and details. Reports are reviewed; submitting one does not automatically change a price.
Send a correction or question · Detailed comparison methodology.
Commercial independence
Advertising and supplier verification do not change price rankings. Any paid placement must be identified separately. Paying Yopepi cannot make a supplier’s higher listed price appear cheapest. Read the disclosures for how commercial features work.
Sponsorship and affiliate disclosures · About Yopepi · Comparison guides.