There are two legitimate ways to get peptides in the United States — from a research-chemical supplier, or through a licensed compounding pharmacy or telehealth clinic. This page lays out both honestly: what each route is, what it costs, what to check before you pay, and the trade-offs neither side tends to advertise.
The most common route. Companies sell peptides labeled “for research use only” (RUO) — not for human consumption. “Research use only” is a real legal designation, not a wink: it means the compound has not been reviewed or approved by the FDA for human use, and the seller is not representing it as a drug, supplement, or food. Most peptide buyers take this route because it’s available now, costs less, and ships fast — but the responsibility for safety, purity, and the law sits with the buyer.
A COA is a lab report from a third party showing what’s actually in the vial. A reputable supplier posts one for every batch and emails it on request. Here’s what to look for — and what it does not prove:
Compare price as cost per milligram, not per vial — a 5 mg vial for $35 ($7/mg) beats a 2 mg vial for $25 ($12.50/mg). Expect roughly $4–$12/mg for common research peptides, less in bulk.
We’ve sent readers to our partner supplier for research-grade peptides with batch COAs and fast US shipping. If you buy through this link we earn a commission — it doesn’t change your price.
Shop the recommended supplierThe medical route: a licensed clinician evaluates you and, if appropriate, a compounding pharmacy prepares the peptide under medical supervision. This is the only route that’s legal to frame as a treatment — and it carries the oversight the research route skips (a prescription, a pharmacy, a clinician of record).
Pricing, the recommended supplier, and a buyer’s checklist for each compound — alongside its full evidence page.