Retatrutide Price UK

What Retatrutide Costs in the UK

This page is part of our research peptide pricing pillar, covering Retatrutide (LY3437943) specifically: current UK prices across all three vial sizes, the cost-per-mg ladder, and how our pricing compares to the wider market.

The Vial-Size Ladder, Worked Through

All three vials contain the same material from the same supply chain; only the mass differs, and cost per mg falls as vial size rises. The 30mg vial's £4.17/mg is roughly 20% cheaper per mg than the 10mg vial's £5.20/mg. Vial size is a reconstitution and draw-count question rather than a potency one, the concentration at reconstitution is set by how much diluent is added, not by which vial it came from. Our full Retatrutide buying guide covers how UK sellers' 10mg listings compare to this ladder in more detail, including where our 10mg sits against the market and where the 30mg is genuinely competitive on a per-mg basis.

Each vial size is certified as its own batch, not sold under a shared certificate, so the purity figure differs slightly between them (99.682% for the 10mg batch through to 99.4% for the 30mg batch), each within normal batch-to-batch variance for the same synthesis run.

Why Retatrutide Costs More Than Most of the Catalogue

Retatrutide is a triple GLP-1/GIP/glucagon receptor agonist, a large, complex molecule relative to most of the catalogue, and synthesis cost scales with sequence length and difficulty. That is also why comparing its price directly against a short peptide like BPC-157 tells you nothing useful, different molecules, different manufacturing problems, covered in how to spot a scam peptide supplier (and why prices vary so much). Retatrutide is mechanistically distinct from the dual-agonist Tirzepatide and from Semaglutide, covered in Retatrutide vs Tirzepatide vs Semaglutide; if you're weighing Tirzepatide's price specifically, see Tirzepatide Price UK.

Verifying the Price

Each vial's batch number, printed on the product page, should match the certificate published in our COA library. Our HPLC purity guide and how to read a peptide COA cover what the chromatogram and mass-spectrometry report should show.

Back to the full catalogue view at Research Peptide Prices UK, or see the weight-loss & metabolic category for the rest of this cluster.

Disclaimer: Prices shown are current UK catalogue prices at time of publication; check the live shop before ordering. Retatrutide is supplied strictly for in-vitro laboratory research use, not for human or animal use. This page does not provide dosing, administration or treatment guidance. Not medical advice.