Northline Labs sells research peptides on the strength of "99%+ purity" claims, but the paperwork behind that number doesn't name who tested it, and one buyer says their order arrived short.

A Minneapolis, MN-based US supplier at northlinelabs.org selling BPC-157, semaglutide, retatrutide and 30+ other research compounds, also shown online as Northline Aminos.

Where it trips our checks

• COA traceability: COAs are batch-referenced and HPLC-based, but an independent 2026 review found no named third-party lab (no Janoshik, MZ Biolabs, or similar) and no mass-spec identity confirmation, so purity claims can't be independently checked.
• Promotional signal: the site markets flat "99%+ purity" language without third-party corroboration to back it.
• Substantiated reports: a Facebook post on the seller's own page describes receiving one vial instead of an ordered batch of ten, a first-hand short-ship complaint.

Not seen: a matching pattern on Reddit; the one "Northern Labs" scam thread found in search refers to a different, unrelated domain.

Sources

• A Facebook complaint describing a short-shipped order.
• An independent Northline Research review (2026) covering the address, catalog, pricing, and COA gaps.
• northlinelabs.org and its Trustpilot listing. A separate northlinelabs.com domain, registered October 2025 with privacy-shielded WHOIS, was not confirmed as the same operator and is not folded into this file.

Bottom line: provisional, 3 factors tripped on caution-level documentation and promotional gaps plus one unverified short-ship report; not enough for a red flag yet, worth another check if more buyer reports surface.

— maxg Founder of Ouros Lab. I write the seller research notes here.