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.
- Limitless Biotech reviews: the same company as Limitless Life Nootropics?
- Peptide Partners review: the FDA warning letter, the COA database and the prices
- Direct Peptides review: four sites use the name, what each one states
- Penguin Peptides review: is it legit, prices and COAs
- Ion Peptides review: is it legit, COAs and prices
- Southern Aminos reviews: still open or closed?
- Is Prime Peptides legit? Desk score 3.5, FDA warning letter, lab reports that match
- Is Royal Peptides legit? Desk score 2.9, August 2026 FDA letter, BPC-157 report under another name
- Is Ameano Peptides legit? Desk score 2.8, lab figures shared with other stores, no independent tests
- Is Liberty Peptides legit? Desk score 3.0, Finnrick 482 of 489, no returns
- Is Eros Peptides legit? Desk score 3.2, recent COAs, only 3 independent tests
- Is Peptide Warehouse legit? Desk score 3.3, 60-day returns, no independent test record
- Is Uther Peptides legit? Desk score 3.0, up to 6x cheaper per mg, kits only, no named company
- Is Kimera Chems legit? Desk score 2.9, public certificates, prices behind an account, no independent tests
- Is Pure Health Peptides legit? Desk score 3.7, public COAs, no independent test record
- Is NexaPh legit? Desk score 2.9, a lab report shared with another store, 441st of 489 on Finnrick
- Is Polaris Peptides legit? Desk score 2.7: 45-day returns, but BPC-157 rates 35% on Finnrick, COAs behind a login, ID check
- Is EZ Peptides legit? Two companies: ezPeps desk score 3.8, ezpeptides.com 2.5
- Is Paramount Peptides legit? Desk score 2.8: dated lot COAs, but 20 of 65 Finnrick tests failed and all sales are final
- Is Core Peptides legit? Desk score 3.3: 92 lab certificates on the real store, a Finnrick record of 5 passes in 7 tests and nine look-alike domains
- Is Sports Technology Labs legit? Desk score 3.3: a seven-year-old SARMs-first store with purity-only lab reports, no Finnrick tests and look-alike stores copying its address
- Is Skye Peptides legit? Desk score 3.6: genuine lab reports, a 57% Finnrick record and two look-alike stores
- Is Onyx Peptides legit? Desk score 3.6 for Onyx Research: 25 matching lab certificates, a short history and the other Onyx stores
- Is Certified Peptides legit? Desk score 3.6: Vanguard lab reports, a 62% Finnrick record and the stores that share its name
- Is Simple Peptide legit? Desk score 3.7: 460 public certificates, a 62% Finnrick record and three live look-alike stores
- Is Modern Aminos legit? Desk score 3.1: Chromate reports, a removed Trustpilot profile and the wholesale look-alike
- Is Verified Peptides legit? Desk score 3.9: a large Janoshik library, a mixed Finnrick record and eight look-alike domains
- Is Peptide Crafters legit? Desk score 3.6: a detailed lab page, a 60% Finnrick record and the look-alike domains
- Is Swiss Chems legit? Desk score 3.2: an FDA warning letter, a 48% Finnrick record, lab reports for another client and two live look-alike stores
- Is Biotech Peptides legit? Desk score 3.3: MZ Biolabs certificates checked, prices two to three times the scored vendors and a removed Trustpilot profile
- Is BioLongevity Labs legit? Desk score 3.5: an open COA library with fill and endotoxin results, but 9 of 34 Finnrick tests failed
- Is Evolve Peptides legit? Desk score 3.5: three-lab COAs and 60-day returns, no named company and no independent tests
- Is Atomik Labz legit? Desk score 2.7: Finnrick passed 36 of 45 vials, but no product-page COAs and a mailbox address
- Is Umbrella Labs legit? Desk score 2.9: a 2021 FDA warning letter, no refunds and no independent tests
- Infiniwell review
- Peptide vendors that shut down or got FDA letters in 2025 and 2026
- Peptide purity testing: how to read a COA before you pay
- Are peptides legal in the US? Federal law and all 50 states