TL;DR — Legit peptide vendors publish recent, batch-specific third-party COAs from named labs and answer sourcing questions openly. Here are the green flags, the red flags, and why LabGrade's COA-rated directory is the shortcut.
For Research Use Only · 21+ · not for human or veterinary use · not medical advice.
The research-compound market runs on trust — and trust is exactly what most vendors can't prove. Underdosed vials, bunk product, and outright scams are common. Here is how to separate a legitimate source from a liability.
Green flags: what real vendors do
- Published third-party COAs from a named lab (Janoshik, Colmaric), with batch numbers that match the product you receive.
- Recent, batch-specific testing — not one ancient COA reused across the whole catalog.
- Escrow or trade-assurance on larger orders.
- A consistent reputation across independent communities — not just reviews on their own site.
- Transparency — they answer sourcing and testing questions directly.
Red flags: walk away
- No COA, or an “in-house” COA with no lab named
- Prices far below everyone else (a classic underdosing tell)
- Pressure, vague answers, or crypto-only with no buyer protection
- Reviews that all sound identical
The purity problem
Even a “real” vendor can ship an underdosed or degraded batch. This is why batch-level COAs — and independent verification — matter more than brand reputation alone.
The shortcut
Vetting vendors properly takes hours of cross-referencing and, ideally, your own lab testing. LabGrade has already done it: a curated directory of COA-rated sources, split into bulk and single-order options. See how we rate vendors, or unlock the verified list.