Where to Buy Retatrutide
Retatrutide has no approved commercial version. There is no pharmacy shelf, no brand name, and no manufacturer selling it to consumers — it is still in Phase 3 trials. Everything available online comes from research chemical suppliers, and the quality gap between them is enormous. This page is about how to tell them apart.
The one document that matters: a batch COA
A certificate of analysis is a lab report for a specific production run. The useful ones show two tests, and you should be able to match the batch number on the report to the batch number on your vial.
- HPLC (high-performance liquid chromatography) measures purity. A clean report shows one dominant peak with a stated area percentage — 99%+ is the normal claim for a good supplier. Extra peaks are truncated sequences or by-products.
- Mass spectrometry confirms identity by molecular weight. This is the test that answers "is this actually retatrutide," which HPLC alone cannot.
A generic PDF with no batch number, no date, and no named lab is decoration, not evidence. Suppliers who test properly are usually happy to send the report for the exact lot you will receive if it is not already published.
Retatrutide (RTA) — 10 mg — American Peptides
Our affiliate partner, and the supplier that comes closest to the checklist above: a stated ≥99% purity specification, published batch certificates of analysis, US fulfillment with cold shipping. Verify the COA for your own batch — that advice applies to them as much as to anyone.
We may earn a commission if you buy through this link (at no extra cost to you). Sold for research purposes only.
What retatrutide realistically costs
| Vial size | Typical research-supplier range | Covers at 2 mg/week | Covers at 8 mg/week |
|---|---|---|---|
| 5 mg | $55 – $95 | ~2.5 weeks | < 1 week |
| 10 mg | $90 – $180 | ~5 weeks | ~1.25 weeks |
| 20 mg | $170 – $320 | ~10 weeks | ~2.5 weeks |
Note how much the dose changes the arithmetic. Comparing suppliers on vial price alone is misleading — cost per milligram at your actual protocol is the number that matters. Bundles and multi-vial pricing usually move that number more than switching vendors does.
Red flags
- No batch-specific COA, or one that cannot be matched to your vial.
- Purity claimed without a method. "99% pure" with no HPLC report behind it is a marketing sentence.
- Prices well below the market. Synthesis and testing have a floor; a price under it usually means underfilled vials or a different compound.
- Human-use language. Dosing advice for people, before-and-after photos, or medical claims signal a vendor willing to ignore the rules that keep the category legal.
- No cold-chain option. Lyophilized powder tolerates transit, but a supplier with no cold shipping at all has not thought about stability.
- Anonymous operation. No address, no company entity, support only through a web form.
Storage and handling once it arrives
Lyophilized retatrutide is stable frozen for long periods and should stay at −20 °C until you reconstitute it. After mixing with bacteriostatic water, keep it refrigerated at 2–8 °C, protected from light, and use it within about four weeks. Never shake a reconstituted vial — agitation damages the peptide. Our reconstitution calculator handles the volume math.
Frequently asked questions
Can you buy retatrutide legally?
Retatrutide is not approved by the FDA, so it cannot be sold or prescribed as a medicine in the United States. It is available from research chemical suppliers under a research-use-only designation, which is a different legal category from a pharmacy purchase.
How much does retatrutide cost?
Research suppliers typically price a 10 mg vial between roughly $90 and $180 depending on quantity and vendor. At an 8 mg weekly protocol that works out to a substantially higher monthly figure than at 2 mg, because dose — not price per vial — drives the real cost.
What is a certificate of analysis and why does it matter?
A COA is a third-party lab report showing identity and purity for a specific production batch, usually by HPLC for purity and mass spectrometry for identity. Without a batch-matched COA there is no evidence that the vial contains what the label claims.
What are the warning signs of a bad peptide supplier?
No batch-specific COA, purity claims with no test method named, prices far below every competitor, no physical address, payment only by irreversible methods, and marketing that implies human use or medical benefit. Any one of these is a reason to look elsewhere.
Retatrutide and the full GLP-1 research line — American Peptides
Retatrutide, tirzepatide, cagrilintide and blends, all with batch COAs. Use the coupon below for 10% off your order.
We may earn a commission if you buy through this link (at no extra cost to you). Sold for research purposes only.
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