Compare Peptide Vendors

Head-to-head comparisons between NovaPrime Labs and the other active domestic suppliers, on the criteria you can actually verify.

How to compare any two vendors

Catalog size and website polish tell you almost nothing. Five questions do most of the work.

• Does the certificate name the testing laboratory, or only claim "third-party tested"?
• Is the certificate specific to your lot, or reused across the whole product line?
• Can you read it before paying, or only on request afterward?
• Is synthesis domestic, and is the facility described in specific terms?
• Is there a real address, a working phone number and a published return policy?

The buyer's guide explains why each matters, and the COA guide covers how to evaluate the documents.

A note on what these pages are

We earn a commission when someone uses the NovaPrime code, so these comparisons are not neutral and we are not going to pretend otherwise. What we can do is keep every claim checkable: everything stated about any vendor here comes from their own published material, and where a competitor is genuinely better on a dimension, we say so. Amino Asylum is cheaper. Limitless has a broader catalog. Verify the rest yourself.

Vendors that have closed

Peptide Sciences and PurchasePeptides.com are no longer operating. If you sourced from either, see where to go instead.

Affiliate disclosure: we earn a commission when you use this code. It costs you nothing extra and does not change your price.

Last verified October 26, 2026 by Steven Gawinski.