CURATED VENDOR PROFILE
Northline Labs
A WooCommerce storefront whose tested products carry downloadable third-party COAs from independently queryable labs — Horizon Analytical and ILS Laboratories — 33 of 101 certificate records confirmable against the issuing lab under the Northline Labs client name, at ~99.5% reported purity.
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Our referral link records the visit, but Northline Labs does not currently offer a PeptideBenchmark discount code or automatic discount. Referral credit lasts only one day, so click through right before you order. The affiliate relationship does not change our finding that part of the catalog displays a browser-generated certificate with no underlying laboratory document — see the watch-out on the profile and the linked write-up.
PeptideBenchmark has a disclosed affiliate relationship with Northline Labs. This does not change benchmark scores or trust ratings — it only affects outbound links and pricing-board discount modeling where applicable.
Same formula for every vendor: verifiable testing evidence forms the backbone; third-party reviews adjust it within a bounded range. How scoring works →
Score breakdown
Rank Composition — the terms below are the published receipt for this score. Full formula on the methodology page.
- Verified-evidence backbone
- 7.01
- Third-party reviews (bounded)
- +0.18
- Curated review bonus
- +0.15
Most of the injectable catalog links a downloadable Certificate of Analysis issued by a third-party lab. Horizon Analytical reports (purity by UPLC/MS plus a separate endotoxin certificate) resolve by lot number at horizonanalytical.com; ILS Laboratories reports (HPLC purity and identity, net-peptide content, and endotoxin) resolve by COA number at ils-lab.com. 33 of 101 certificate records were two-factor confirmed — the vendor's lot or COA number is resolved against the lab's own public record and the returned client name is matched to Northline Labs — so the report is reached at the lab, not just hosted by the vendor. Reported purity runs near 99.5%.
Readers who want the tested part of the catalog backed by third-party COAs they can independently confirm at the issuing labs' own lookups.
Only the products with a real certificate on file are backed by verifiable testing. Some catalog products have no third-party COA, and for those the site's interactive COA viewer generates a placeholder lot number and test panels rather than showing a real report — rendered to look identical to the genuine cards. Treat an on-page "certificate" as evidence only when it opens the actual lab PDF. Fixed blends (GLOW, KLOW, and the component-pair sets) are mapped to their labeled vial total for $/mg comparison; hCG 5,000 IU appears in IU hormones, while bacteriostatic water remains outside Pricing.
Read the full finding: which products show fabricated COAs → →Per-product Horizon Analytical and ILS Laboratories COAs with public provider verification
Tested products link a vendor-hosted COA PDF issued by Horizon Analytical or ILS Laboratories. Each provider-confirmed Horizon lot (NLL-…) is searchable at horizonanalytical.com and each ILS COA number resolves at ils-lab.com; both return the report under the Northline Labs client name, so a reader can confirm the certificate at the issuing lab rather than trusting the vendor's upload.
10 public certificate examples
Representative product pages showing how this catalog exposes report or verification paths. Examples, not proof for every current lot.
Assayed content is not fill accuracy. Laboratories report net peptide content, and peptides ship as salts, so an honestly filled vial commonly assays below its gross label — a figure under 100% is not evidence of a short vial. These numbers are also not comparable between vendors: they exist only where a laboratory reports net content, so they partly reflect which laboratory a vendor uses.
1 of this vendor's 101 certificates with indexed embedded images contains a reviewed byte-identical chromatogram that also appears in certificate contexts associated with Value Research Labs. This is consistent with shared lot, but does not establish a sale or supply-chain direction.
These certificates contain a reviewed byte-identical instrument trace, meaning one analysis was reported in more than one brand context. That supports a shared-lot interpretation, but cannot establish whether either brand sold the lot or who supplied whom. How this is measured →
Holding a certificate for this vendor that is not here? Send it to the archive →
Observed from public domain records and the vendor's own site on Aug 27, 2026. Identity facts are shown for context and do not affect scores.