TeamWhy do peptide prices vary so much from lab to lab?

A few real drivers, in rough order of impact: 1. Testing overhead. A lab that runs every batch through an accredited third party (purity, net content, mass-spec ID, sterility, endotoxins, heavy metals) spends real money per batch. Labs that skip testing — or "test" without publishing — can undercut them. 2. Scale and sourcing. Bigger labs buy raw material in bulk and get better synthesis pricing. Some of the spread is just purchasing power, not quality. 3. Brand tax. Some vendors charge more because they can. We've seen the same peptide at $39.99 and $329 for a 10mg vial in the same week — and the cheaper one had the better COA. 4. Discount-code games. Big codes on inflated list prices are common, which is why we compare effective $/mg after codes, never sticker price. Practical takeaway: price alone tells you almost nothing in either direction. Check the vendor's published COAs and testing score first (peptidepub.com/vendors), then buy the cheapest vial that passes — that's the whole strategy behind our price tables.