Frequently asked questions

Which peptide vendor is best in 2026?

Amino Club is the Bureau’s Editor’s Pick at 4.7: it is the vendor readers actually order from, it lists every compound on the Bureau's price tracker, and it publishes a batch COA on every product page. Pantheon Peptides is the runner-up at 4.5, with the widest single catalog. Limitless Life Peptides and Apollo Peptide Sciences are held at 3.9 because Finnrick has tested each four or more times and fewer than half of the vials passed. Independent test results sit beside every score, not inside it. Which one suits you depends on whether price, documentation or catalog matters most.

Which peptide vendor has the lowest price per mg?

No one vendor is lowest across the board: it changes by compound and with store sales, and the price tracker shows today's lowest for each. PSPeptides has some of the lower prices per mg on large GHK-Cu and NAD+ vials, though Amino Club and Luvaminos were cheaper on the GLP compounds at the 1 November check, and Ascension Peptides has the lowest cash price on a single vial once its 50% through-the-link discount applies, with a flat $15 shipping fee and a no-refund policy.

Which peptide vendor attaches a COA to every order?

Apollo Peptide Sciences attaches the COA to every order without chasing it, at the highest per-mg cost in the set. Amino Club publishes a batch COA on every product page, and Limitless Life Peptides posts COAs on its catalog pages, so the buyer has to pull the one that matches the vial.

More vendor reviews and research

These vendors and topics are covered by the Bureau but are not in the scored table above. Where a line quotes a Finnrick or other independent test result next to a score, the result is context: it sits beside the score and is not counted in it.