The word certus is Latin for settled, verified, beyond doubt.

Research peptides have an unusual problem: the buyer cannot inspect the goods. A vial of lyophilised powder looks identical whether it contains 99 % of the compound on the label, 80 % of it, or something else entirely. Unless you have an HPLC and a mass spectrometer on your own bench, you are buying a claim.

Which means the entire category runs on trust signals rather than evidence, and trust signals are cheap to fake. Anyone can put “99 % purity” and “third-party tested” on a product page. Anyone can post a certificate as a flat image with the lot number cropped out. The gap between a supplier who tests and a supplier who says they test is invisible at the point of sale.

We closed that gap the only way it can be closed: by making the evidence specific enough to be falsifiable. Every lot has a public page. The certificate names the testing laboratory and its accreditation. The assay table shows the method, the acceptance criterion and the measured value for every line — not a pass mark. And it is indexed by the code printed on the label, so you can check the vial in your hand against the record on this site.

Certus Peptides is a research chemical supplier. We are not a 503A compounding pharmacy and not a 503B outsourcing facility. Those are distinct regulatory categories with distinct oversight and permitted activities, and suppliers who imply otherwise are describing a status they do not hold.

Everything we sell is for laboratory research use only. Nothing on this site is a drug, a supplement, a cosmetic or a medical device. Nothing has been evaluated by the FDA. Nothing is intended for human or veterinary administration. That is why our product pages describe mechanisms and physical properties and never describe dosing or outcomes — not because we are being cagey, but because a supplier who sells research material and talks about outcomes is selling something other than research material.

Synthesis, fill and finish happen in the United States. Release testing is contracted to independent laboratories accredited to ISO/IEC 17025 — independent meaning not owned by, and not a subsidiary of, anyone who benefits from the result.

Fulfilment runs out of Mount Pleasant, SC. Material is held lyophilised at -20 °C and ships in an insulated cold pack, tracked, with same-day dispatch on orders placed before 1:00 PM PT on a business day.