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Two audits, side by side. Composite, subscores, shipping, payment, coupons. Ion Peptide takes the higher composite this cycle.
US research-peptide vendor whose 106 Kovera Labs reports (median 99.93% purity, zero failures) remain its strongest signal - but those records live on the lab's side, because as of 12 October 2026 Ion's own site returns a site-wide Cloudflare block to us and retail prices are account-gated. Coded ION-X SKU naming on a subset of products carries a regulatory-exposure deduction.
Held for reference, not a current recommendation. The link we drew from the December 2024 FDA warning letter to "Summit Research Peptides" to the current Summit Biotech site is an inference, not a record - the letter names summitpeptides.shop, while summitbiotechusa.com was registered months later; the only hard tie is a same-name domain that 301-redirects to it. The catalog is login-walled, our data is from May 2026, and there is no independent buyer record, so readers cannot re-check anything. We have removed it from the ranked vendor list.