American Peptides vs NextGenPeps: prices, COAs and track record compared

Side by side from public evidence and live prices, checked Oct 15, 2026. Neither vendor paid to be here, and we haven't lab-tested either, so this compares openness and price, not purity.

The short answer

• NextGenPeps scores higher on our six public-information checks: 57/100 against 47/100, ahead on domain age and naming an independent lab (American Peptides leads on published policies). Both have 5 of 6 checks completed; unfinished checks score 0.
• Only 2 peptides are priced at both (GHK-Cu and BPC-157), too few to call either one cheaper overall.
• Both publish only generic or sample COAs, not batch-specific ones.
• American Peptides' domain was registered Feb 2026 (7 months ago); NextGenPeps' domain was registered Apr 2025 (17 months ago).
• American Peptides says it ships to the US; NextGenPeps says it ships to the US, and internationally.
• We haven't lab-tested either vendor, so none of this measures purity.

At a glance

Vendor sites: americanpeptides.us · nextgenpeps.com

Transparency checks side by side

The same six checks of public information we run on every vendor, worth 100 points in total. The evidence behind each finding is linked on each vendor's profile: American Peptides and NextGenPeps. How we score.

Prices on the peptides both sell

Each vendor's lowest comparable price per milligram, picked the same way as on our price pages: single vials before multi-vial kits, in stock before out of stock. Vial sizes differ (shown under each price), and a bigger vial usually costs less per milligram.

Only 2 peptides are priced at both (GHK-Cu and BPC-157), too few to call either one cheaper overall. Prices fetched Oct 15, 2026; they change daily.

Against every vendor we track, American Peptides' prices are typically 45% above the median. That's our price index: the median of each vendor's best price per peptide against the market median. See every vendor's index.

Only at American Peptides (37): 5-Amino-1MQ, AOD-9604, ARA-290 (cibinetide), CJC-1295 + Ipamorelin blend, CJC-1295 without DAC (Mod GRF 1-29), Dihexa, DSIP, Epitalon, Glutathione, Humanin, IGF-1 LR3, Ipamorelin, Kisspeptin-10, KPV, Melanotan I, Melanotan II, MOTS-c, NAD+, P21, PE-22-28, Pinealon, Prostamax, PT-141 (bremelanotide), Selank, Semax, Semax + Selank blend, Sermorelin, Snap-8, SS-31 (elamipretide), TB-500, Tesamorelin, Tesamorelin + Ipamorelin blend, Testagen, Thymalin, Thymosin Alpha-1, Vesugen, Vilon.

Before you order from either

• Ask for the batch COA that matches the vial you'll receive, and check it with our COA guide.
• Pay by card or PayPal where you can: both can be disputed if an order goes wrong.
• Check the domain is the vendor's real one. Look-alike sites copy well-known names (how to spot them).
• Our full checklist: how to check a peptide vendor.

Vendors that score higher than both

Live vendors with all six checks completed, a higher transparency score than American Peptides and NextGenPeps, and at least one of the same peptides. Payments from vendors never affect this list.

Full profiles: American Peptides review · NextGenPeps review · other comparisons.

Is something wrong?

If you run either vendor, or you have evidence that something here is out of date, email [email protected] with a link to the evidence. We re-check within five business days and log every change on our corrections page.