Midwest Peptide

Midwest Peptide (Midwest BioResearch LLC) is a US-based research-peptide supplier with a genuinely public COA program: every product page links a batch-specific certificate, and there's a dedicated COA page. All testing we saw is from Freedom Diagnostics, a recognized third-party lab — we verified two real reports, a BPC-157 at 99.48% and a Melanotan-II at 99.13%, both batch-linked with identity by LC-MS and verifiable search codes.

That public, batch-level testing is what our 40% COA factor rewards, and it carries the score. Reputation backs it up: 4.9/5 across 127 Trustpilot reviews, with a notably responsive founder. The brand accepts credit/debit cards alongside Zelle/CashApp/ACH, and the full catalog is in stock. What keeps it just under the very top tier is a single testing lab (rather than the ISO-17025/multi-lab panels the 9+ vendors publish) and a still-young, largely single-platform reputation. Pricing on the GLP-1/2/3s is a real strength.