Prices checked 23 Sept 2026 · 28 listings · 24 in stock · Incretin analogues
Each currency is shown separately; prices are never converted.
Regulatory status
Retatrutide is an investigational compound. Material sold as a 'research' product is not an approved medicine.
Retatrutide is an investigational compound and is not a licensed medicine in the UK. (Reviewed 23 Sept 2026.)
In United Kingdom the regulator is the Medicines and Healthcare products Regulatory Agency (MHRA). Rules on buying, importing and using this product differ by country. Suppliers list it for laboratory research; nothing here is medical advice.
At a glance · 23 Sept 2026
Retatrutide is an investigational once-weekly peptide from Eli Lilly that activates three hormone receptors: GIP, GLP-1 and glucagon. It produced up to 24.2% average weight loss at 48 weeks in a 2023 phase 2 trial, and Lilly has since reported positive phase 3 TRIUMPH results. As of September 2026 it is not an approved medicine anywhere we could confirm, so any retatrutide sold online is unlicensed material, not a medicine. Read the full Retatrutide guide, with the published research and references.
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Retatrutide 10mg | 10mg | £45.00 | £4.50/mg | Out of stock | On their site ↗ |
| Retatrutide 30mg | 30mg | £85.00 | £2.83/mg | Out of stock | On their site ↗ |
| Retatrutide 10mg — Trade Pack (10 vials) | 10mg | £84.02 | — | In stock | On their site ↗ |
| Retatrutide 30mg — Trade Pack (10 vials) | 30mg | £150.03 | — | In stock | On their site ↗ |
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Retatrutide 5mg Research Peptide | vial | £75.00 | £15.00/mg | In stock | On their site ↗ |
| Retava Retatrutide 10mg | 10mg | £150.00 | £15.00/mg | In stock | On their site ↗ |
| Retatrutide 10mg Research Peptide | vial | £95.00 | £9.50/mg | In stock | On their site ↗ |
| Retatrutide 20mg Research Peptide | vial | £140.00 | £7.00/mg | In stock | On their site ↗ |
| Alluvi Retatrutide 20mg Pen ×2 Bundle | 20mg | £199.99 | — | In stock | On their site ↗ |
| Alluvi Retatrutide 20mg (R&D) | 20mg | £100.00 | £5.00/mg | In stock | On their site ↗ |
+ 3 more on the full catalogue.
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Retatrutide GLP-3 Pen 40mg | 40mg | £150.00 | — | Out of stock | On their site ↗ |
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Retatrutide Research Compound 10mg Vial | 10mg | £89.00 | £8.90/mg | In stock | On their site ↗ |
| Retatrutide Research Compound 20mg Vial | 20mg | £149.00 | £7.45/mg | In stock | On their site ↗ |
| Retatrutide 40mg Pen | 40mg | £125.00 | — | In stock | On their site ↗ |
| Synexa Retatrutide 40mg RapidPen® | 40mg | £125.00 | £3.13/mg | Out of stock | On their site ↗ |
| Retatrutide Research Compound 40mg Vial | 40mg | £249.00 | £6.23/mg | In stock | On their site ↗ |
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Retatrutide GLP-3 Pen 40mg | 40mg | £150.00 | — | In stock | On their site ↗ |
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Retatrutide UK | 20 mg | £96.99 | £4.85/mg | In stock | On their site ↗ |
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Retatrutide 10mg / 20mg / 30mg / 40mg (Reta) — Research Peptide UK | 10mg | £49.99 | — | In stock | On their site ↗ |
| Retatrutide UK — Research Vials & Pre-Filled Pens (10mg / 20mg / 30mg / 40mg) | 10mg | — | — | In stock | On their site ↗ |
| Retatrutide Pen UK — Pre-Filled Quick Pen (20mg / 30mg / 40mg) | 20mg | — | — | In stock | On their site ↗ |
| Retatrutide Vials UK — 20mg / 30mg / 40mg Research Vials | 20mg | — | — | In stock | On their site ↗ |
| Retatrutide Vials UK — Price Per mg | As listed | — | — | In stock | On their site ↗ |
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Retatrutide Research Peptide | As listed | £55.60 | — | In stock | On their site ↗ |
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Retatrutide 10mg | 10mg | £69.99 | £7.00/mg | In stock | On their site ↗ |
The median listed price per mg across every tracked supplier listing Retatrutide in each currency, recorded daily from validated listings only. Days with too few listings to publish are left out, not estimated. How we validate prices
GBP · median per mg
No validated daily statistics yet. A trend appears once there is more than one day of data.
Catalogue changes, last 30 days
No Retatrutide listings added or withdrawn since we began recording catalogue changes.
Price per mg is only half the comparison. Check that the supplier publishes a certificate of analysis for the batch it is selling, ideally from an independent laboratory, and that the certificate confirms identity as well as purity: our guide on how to read a COA shows what to look for. A price far below the rest of the list is more often a warning than a bargain; peptide prices explained sets out why.
For what Retatrutide is and what published studies have found, see our Retatrutide guide. Handling questions are covered in how to store peptides, and the peptide calculator converts a vial size and water volume into concentration and syringe units. Rules on buying and importing differ by country: read are peptides legal in the UK? and see all suppliers serving the UK.
How to spot a fake peptide supplier explains each of these in more detail, and third-party peptide testing covers what independent results can and cannot prove.
Most research peptides are sold as freeze-dried (lyophilised) powder in sealed vials, which is mixed with a diluent such as bacteriostatic water before use in the lab. Some suppliers also sell pre-mixed solutions, nasal sprays or capsules under the same name. These are different products with different stability and dosing, so compare price per mg only between the same form, and check which form a listing is before comparing it with the rest of the table.
9 of the suppliers PepFinder tracks list Retatrutide and are based in or ship to the UK. The highest rated are Simply Peptides, Peptide Lab UK, British Peptides. The list on this page is ranked by PepFinder Score, which weighs reliability, delivery, pricing, support and customer reviews; nobody pays to be included or to rank higher.
Listed prices in GBP run from £2.83/mg to £15.00/mg, median £7.00/mg, across 15 listings from 5 suppliers. Compare price per mg rather than price per vial, and only within one currency; a price far below the rest is more often a warning than a bargain.
Suppliers on this page list Retatrutide in vial, 10mg, 20mg, 20 mg, 30mg, 40mg. Most research peptides are sold as freeze-dried powder in sealed vials; capsules, sprays and pre-mixed solutions are different products, so compare price per mg only between the same form.
Most research peptides are not controlled drugs in the UK, but selling or supplying an unlicensed medicine is an offence under the Human Medicines Regulations 2012; growth hormone and HCG are Class C controlled drugs. Our page on whether peptides are legal in the UK sets out the rules with a link to every source. This is general information, not legal advice.
Non-controlled medicines can be imported for your own use without an import licence, but Border Force can seize quantities above reasonable personal use, and controlled drugs such as growth hormone and HCG cannot be posted to you from overseas. Each supplier on this page shows where it is based, so you can see whether an order would cross a border.
Ask for a certificate of analysis for the batch being sold, and check that it names the laboratory, the batch number and the test date, and that it confirms identity by mass spectrometry as well as purity by HPLC. PepFinder has not yet collected certificates for Retatrutide from these suppliers, so check each supplier's own site.
How this list is built: suppliers appear because they list Retatrutide on their own website, read by our catalogue checks; nobody pays to be included or to move up. Ranking is by PepFinder Score. Prices, sizes and stock are as each site listed them when checked and may have changed. Provisional scores are based on incomplete research.
