For Research Use Only — Not for Human Consumption

International Shipping Available — Dispatched Worldwide from the UK

  • Free UK shippingTracked, orders over £50
  • Same-day dispatchOrder before 3pm GMT
  • CoA on every batchHPLC purity report
Professor PeptideResearch Peptides

UK Research-Peptide Catalogue

Retatrutide UK

Research-grade triple GLP-1 / GIP / glucagon receptor agonist — ≥99% HPLC purity, Certificate of Analysis on every batch, dispatched same-day from our UK laboratory.

Buy Retatrutide — from £60.00 View Batch CoA Library

UK research pricing · Free tracked shipping

£60.0010 mg vial

5 sizes available: 10mg · 20mg · 30mg · 40mg · 50mg

Buy Retatrutide →
UK-Based Laboratory
≥99% HPLC Purity
CoA Per Batch
Same-Day UK Dispatch

About Retatrutide

Retatrutide (LY-3437943) is a synthetic 39-amino-acid peptide engineered as a single-molecule triple agonist of the GLP-1, GIP and glucagon receptors. In published preclinical and Phase-2 literature it has drawn attention for its incretin pharmacology and weight-regulation pathway research.

Every Retatrutide vial supplied by Professor Peptide is manufactured to research-grade specification, lyophilised, and HPLC-tested to ≥99% purity. Each batch ships with a Certificate of Analysis documenting the chromatogram, mass-spectrometry confirmation and water content.

CAS
2381089-83-2
Mol. weight
4731.4 g/mol
Purity
≥99% HPLC
Form
Lyophilised

Sizes & UK Pricing

Free UK shipping (tracked) on every order.

Retatrutide 10 mg vial

Lyophilised · ≥99% HPLC · Batch CoA

£60.00≈ $76 · €70Add to Order

Retatrutide 20 mg vial

Lyophilised · ≥99% HPLC · Batch CoA

£110.00≈ $140 · €129Add to Order

Retatrutide 30 mg vial

Lyophilised · ≥99% HPLC · Batch CoA

£162.00≈ $206 · €190Add to Order

Retatrutide 40 mg vial

Lyophilised · ≥99% HPLC · Batch CoA

£185.00≈ $235 · €216Add to Order

Retatrutide 50 mg vial

Lyophilised · ≥99% HPLC · Batch CoA

£227.00≈ $288 · €266Add to Order

Certificate of Analysis — every batch

Professor Peptide does not ship a single vial of Retatrutide without a batch-matched Certificate of Analysis. Each CoA documents the testing performed on the batch in your hand — not a generic spec sheet.

  • HPLC purity chromatogram (≥99%)
  • Mass-spectrometry identity confirmation
  • Residual water content (Karl Fischer)
  • Appearance & solubility specification
  • Bacterial endotoxin (where applicable)
  • Batch number, manufacture & retest dates

You can browse historical CoAs in our public CoA library, or request the specific batch CoA for your shipment at hello@professorpeptide.co.uk.

View Batch CoA

Batch RT60/202602 · Third-party analysis (Janoshik)

Research applications

In-vitro framing only

  • GLP-1, GIP and glucagon receptor binding-affinity assays
  • Cyclic-AMP signalling and β-arrestin recruitment studies
  • Comparative incretin pharmacology and half-life modelling
  • Energy-expenditure pathway modelling in hepatocyte cultures
  • Pancreatic β-cell line glucose-responsive insulin secretion
  • Comparative triple-agonist structure-activity research

Storage & reconstitution

Lyophilised

-20 °C, sealed, away from light. Stable to retest date on the CoA.

Reconstituted

2–8 °C in bacteriostatic water; use within 28 days.

Calculator

Open reconstitution guide →

Retatrutide UK — Frequently Asked Questions

What is Retatrutide?+
Retatrutide is a synthetic 39-amino-acid peptide investigated as a triple agonist of the GLP-1, GIP and glucagon receptors. It is supplied by Professor Peptide as a lyophilised research-grade reference compound for in-vitro laboratory research only — not for human or veterinary consumption.
Is Retatrutide legal to buy in the UK for research?+
Retatrutide is not a controlled substance under the UK Misuse of Drugs Act 1971. It is supplied for laboratory research use only and is not authorised by the MHRA for human or veterinary administration. UK institutions and independent researchers may purchase it for in-vitro work; resale or administration to humans or animals is prohibited.
What purity does Professor Peptide guarantee?+
Every Retatrutide batch is HPLC-tested to ≥99% purity. The Certificate of Analysis (CoA) for the exact batch you receive is available on request and on our CoA library, and includes HPLC chromatogram, mass-spectrometry confirmation, water content, and bacterial endotoxin results where applicable.
What sizes and prices do you stock?+
We currently stock 10 mg, 20 mg, 30 mg, 40 mg and 50 mg vials of Retatrutide. Prices start at £60 for 10 mg and scale to £220 for 50 mg. UK shipping is free.
How fast is UK delivery?+
Orders placed before 2 pm UK time on a working day are dispatched the same day from our UK fulfilment centre via tracked Royal Mail / DPD next-day. Most UK addresses receive Retatrutide within 24–48 hours of dispatch.
How should Retatrutide be stored and reconstituted?+
Lyophilised Retatrutide is shipped at ambient temperature and is stable in transit. On arrival, store sealed at -20 °C; once reconstituted with bacteriostatic water, store at 2–8 °C and use within 28 days. See our reconstitution calculator for working-concentration guidance.
Do you provide a Certificate of Analysis with every order?+
Yes. A batch-specific CoA is available for every vial we ship. You can download the CoA library publicly, or request the exact batch CoA after purchase by emailing hello@professorpeptide.co.uk.

Continue your research

Peptides UK

Full UK research peptide catalogue with batch CoA.

Research Peptides UK

Research-only compliance, UK dispatch, CoA library.

Reconstitution Guide

Dose calculator & solvent ratios for retatrutide.

Order research-grade Retatrutide from the UK

Same-day UK dispatch · Batch CoA on every vial · ≥99% HPLC purity guaranteed.

View Retatrutide product page →

For laboratory research use only · Not for human or veterinary consumption