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Two audits, side by side. Composite, subscores, shipping, payment, coupons. Ion Peptide takes the higher composite this cycle.
Established US-domestic peptide synthesizer with a substantial catalog and same-day shipping. It does publish per-batch COAs - 84 of 89 product pages carry a downloadable certificate, most of them MZ Biolabs reports naming the client and lot, with a set of older SKUs on a lab-unnamed template. Public-data audit; we have placed no test order.
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.