Real, independently verifiable via a portal we tested ourselves with a reproducible historical match. Not accredited, no public address, and several safety-relevant panels remain unbuilt. A legitimate mid-tier verification, not a full safety guarantee.
Horizon Analytical is a research-compound testing lab offering UPLC/MS purity and identity testing, with per-lot COAs searchable through a public verification portal. Offers standard peptide, peptide blend, and GLP-1-specific HPLC/MS panels, plus LAL endotoxin testing.
Horizon Analytical does not claim ISO/IEC 17025 accreditation anywhere on its own site, and no listing was found in the A2LA registry.
The Verify COA portal (horizonanalytical.com/verify-coa) is live and fully functional — tested directly with a real historical lot number (TRL-9907743) from a True Research Labs COA and it correctly returned both matching records (compound: Selank), reproducing the original finding exactly. Endotoxin (LAL) testing is now a live paid offering ($175, 5–7 days) — a real capability added since this lab was first reviewed.
No physical address is published anywhere on the site. Direct A2LA registry search did not complete cleanly during this session (technical error on A2LA's own search interface) — absence of accreditation is inferred from the lab's own site making no such claim, not from a confirmed registry search.
Heavy Metals and Sterility panels are both still listed as "Coming Soon," and a third gap not previously noted — "Proteins & HGH" testing — is also marked "Coming Soon." For an injectable research compound, this means Horizon currently covers identity/purity/potency and endotoxin, but not a full safety panel.
Verify a COA from Horizon Analytical yourself: horizonanalytical.com/verify-coa — tested directly by Watchtower and confirmed working.
Last reviewed August 2, 2026 by Watchtower Peptides.