RetaRadar
Tracking 59 UK retatrutide suppliers (42 in stock) · prices & stock checked 9 October 2026

Best Places to Buy Retatrutide in the UK (2026)

We track 59 UK retatrutide suppliers and rank them on independent lab testing, price per mg, vial sizes, delivery speed and business transparency. Here is where we would buy, and why.

59 suppliers tracked42 with stock now157 prices monitoredLast checked 9 October 2026

How we make money: RetaRadar is reader-supported. When you click a supplier link and buy, we may earn a commission, at no extra cost to you. No supplier pays to be listed or to change its position. Read our full disclosure.

Best overall
LeoLab: 9.6/10
Lowest price per mg
Power Peptides: from £1.75/mg
Most sizes in stock
LeoLab: 7 sizes
Free tool
Retatrutide dosing calculator →

Top 10 UK retatrutide suppliers

Ranked by our weighted RetaRadar score (methodology below). Only suppliers with retatrutide in stock are ranked. Prices are the suppliers’ own GBP prices, read from their stores on 9 October 2026, before shipping or discount codes.

#1

LeoLabBest overall

leolab.co.uk

The most transparent UK retatrutide supplier we track, with the widest choice of vial sizes.

9.6
RetaRadar score / 10
10mg £75 · £7.50/mg15mg £100 · £6.67/mg20mg £125 · £6.25/mg30mg £175 · £5.83/mg40mg £235 · £5.88/mg50mg £295 · £5.90/mg60mg £325 · £5.42/mg
Business
Trading since 2018
Delivery
Delivery to any UK address in 1-3 business days via Royal Mail and DHL
Payment
Bank transfer (GBP), Cryptocurrency
Testing
Third-party purity + heavy-metal results published

Pros

  • Seven vial sizes from 10 mg to 60 mg
  • Publishes third-party purity and heavy-metal test results
  • London address, trading since 2018
  • Free BAC water and syringes with every vial

Cons

  • Higher price per mg than budget shops
  • No card payments (bank transfer or crypto)

Visit LeoLab: retatrutide from £75

#2

Peptology Labs

peptologylabs.uk

Publishes independent lab reports · retatrutide from £4.00/mg · 3 listings in stock.

8.3
RetaRadar score / 10
10mg £64.95 · £6.50/mg20mg £89.95 · £4.50/mg30mg £119.95 · £4.00/mg
Business
UK company no. 17117319, since 2026
Delivery
Next-day UK delivery, same-day dispatch, tracked via DPD/Royal Mail
Payment
Not stated
Testing
Independent lab reports (Janoshik) published

Pros

  • Independent lab reports (Janoshik) published
  • UK company no. 17117319, since 2026
  • Fast UK dispatch
  • Trustpilot 5/5 (49 reviews)

Cons

  • New business (registered 2026)

Visit Peptology Labs

#3

Bionik Peptides

bionikpeptides.com

Publishes independent lab reports · retatrutide from £4.25/mg · 3 listings in stock.

8.2
RetaRadar score / 10
10mg £60 · £6.00/mg30mg £130 · £4.33/mg40mg £170 · £4.25/mg
Business
UK company no. 17133366, since 2025
Delivery
International shipping offered
Payment
Not stated
Testing
Independent lab reports (Janoshik) published

Pros

  • Independent lab reports (Janoshik) published
  • UK company no. 17133366, since 2025

Cons

  • Nothing notable

Visit Bionik Peptides

#4

AllMyPeptides

allmypeptides.com

Retatrutide from £2.50/mg · 1 listing in stock.

7.9
RetaRadar score / 10
60mg £149.99 · £2.50/mg
Business
Address published
Delivery
Next-day dispatch if ordered before 2pm; free over £75; express next-day £3.99; plain unbranded packaging…
Payment
Visa, Mastercard, Apple Pay, Google Pay
Testing
Third-party testing stated

Pros

  • Third-party testing stated
  • Low price per mg (from £2.50)
  • Fast UK dispatch

Cons

  • Only one size in stock

Visit AllMyPeptides

#5

Nova Biolabs

novabiolabs.co.uk

Publishes independent lab reports · retatrutide from £3.50/mg · 1 listing in stock.

7.8
RetaRadar score / 10
10mg £35 · £3.50/mg
Business
No company details on site
Delivery
Ships to UK and Ireland only
Payment
Pay by Bank (UK Open Banking), Bitcoin
Testing
Independent lab reports (Janoshik) published

Pros

  • Independent lab reports (Janoshik) published
  • Low price per mg (from £3.50)
  • Fast UK dispatch

Cons

  • No company registration or address on site
  • Only one size in stock

Visit Nova Biolabs

#6

Bio Supply UK

biosupplyuk.com

Retatrutide from £4.13/mg · 3 listings in stock.

7.7
RetaRadar score / 10
10mg £59.99 · £6.00/mg20mg £84.99 · £4.25/mg30mg £124 · £4.13/mg
Business
Trading since 2024
Delivery
Same-day dispatch claimed
Payment
Not stated
Testing
Third-party testing stated

Pros

  • Third-party testing stated
  • Fast UK dispatch

Cons

  • No company registration or address on site

Visit Bio Supply UK

#7

Apex Biolab

apexbiolab.com

Retatrutide from £6.25/mg · 2 listings in stock.

7.7
RetaRadar score / 10
10mg £74.99 · £7.50/mg20mg £124.99 · £6.25/mg
Business
UK company no. 12906549, since 2020
Delivery
Free UK shipping; 24-hour dispatch option
Payment
Bank transfer, Pay by Bank, Credit/debit card
Testing
Third-party testing stated

Pros

  • Third-party testing stated
  • UK company no. 12906549, since 2020
  • Fast UK dispatch

Cons

  • Expensive per mg (from £6.25)

Visit Apex Biolab

#8

JG Peptides Plus

jgpeptidesplus.com

Retatrutide from £3.50/mg · 6 listings in stock.

7.6
RetaRadar score / 10
5mg £39 · £7.80/mg10mg £65 · £6.50/mg15mg £89 · £5.93/mg20mg £99 · £4.95/mg30mg £120 · £4.00/mg40mg £140 · £3.50/mg
Business
No company details on site
Delivery
Free UK express next-day delivery on orders over £100; variable charge below that
Payment
Not stated
Testing
HPLC / COA claimed by supplier

Pros

  • Low price per mg (from £3.50)
  • 6 sizes in stock
  • Fast UK dispatch

Cons

  • HPLC / COA claimed by supplier
  • No company registration or address on site

Visit JG Peptides Plus

#9

Momentum Peptides

momentumpeptides.com

Publishes independent lab reports · retatrutide from £5.00/mg · 3 listings in stock.

7.6
RetaRadar score / 10
10mg £79.95 · £8.00/mg20mg £119.95 · £6.00/mg30mg £149.95 · £5.00/mg
Business
No company details on site
Delivery
UK: same-day dispatch before 2pm Mon-Fri, 24hr tracked Royal Mail, free next-day shipping over £100
Payment
Open banking (pay by bank), Cryptocurrency (BTC, ETH, USDT, USDC)
Testing
Independent lab reports (Janoshik) published

Pros

  • Independent lab reports (Janoshik) published
  • Fast UK dispatch

Cons

  • No company registration or address on site

Visit Momentum Peptides

#10

Zentra Peptides

zentra-peptides.com

Retatrutide from £3.25/mg · 4 listings in stock.

7.5
RetaRadar score / 10
10mg £46.99 · £4.70/mg20mg £79.99 · £4.00/mg30mg £115.95 · £3.87/mg40mg £129.99 · £3.25/mg
Business
UK company no. 17212134
Delivery
UK Standard £4.49 / Express £7.49, free UK over £100; also ships EU/US/rest of world
Payment
Not stated
Testing
No test reports found

Pros

  • UK company no. 17212134
  • Low price per mg (from £3.25)
  • 4 sizes in stock

Cons

  • No test reports found

Visit Zentra Peptides

All 42 UK suppliers with retatrutide in stock

#SupplierFromBest £/mgSizes in stockTestingScore
1LeoLab£75£5.4210mg, 15mg, 20mg, 30mg, 40mg, 50mg, 60mgThird-party purity + heavy-metal results published9.6Visit
2Peptology Labs£64.95£4.0010mg, 20mg, 30mgIndependent lab reports (Janoshik) published8.3Visit
3Bionik Peptides£60£4.2510mg, 30mg, 40mgIndependent lab reports (Janoshik) published8.2Visit
4AllMyPeptides£149.99£2.5060mgThird-party testing stated7.9Visit
5Nova Biolabs£35£3.5010mgIndependent lab reports (Janoshik) published7.8Visit
6Bio Supply UK£59.99£4.1310mg, 20mg, 30mgThird-party testing stated7.7Visit
7Apex Biolab£74.99£6.2510mg, 20mgThird-party testing stated7.7Visit
8JG Peptides Plus£39£3.505mg, 10mg, 15mg, 20mg, 30mg, 40mgHPLC / COA claimed by supplier7.6Visit
9Momentum Peptides£79.95£5.0010mg, 20mg, 30mgIndependent lab reports (Janoshik) published7.6Visit
10Zentra Peptides£46.99£3.2510mg, 20mg, 30mg, 40mgNo test reports found7.5Visit
11Peptide Shop£70£3.2510mg, 20mg, 30mg, 40mg, 50mg, 60mgNo test reports found7.4Visit
12SPT Peptide£90£2.5030mg, 40mg, 60mgNo test reports found7.3Visit
13Peptides UK 4U£80.10£3.4620mg, 30mg, 40mgNo test reports found7.3Visit
14Pyrox Labs£39.99£3.755mg, 10mg, 20mg, 40mgNo test reports found7.3Visit
15Vitality Peptides£104.90–Not statedHPLC / COA claimed by supplier7.3Visit
16Chilton Labs£61.49£4.1110mg, 30mg, 40mgThird-party testing stated7.2Visit
17British Peptides£170£4.2540mg penHPLC / COA claimed by supplier7.1Visit
18Power Peptides£21.50£1.7510mg, 20mgNo test reports found7.0Visit
19Premium UK Peptides£110£3.1720mg, 40mg, 60mgNo test reports found7.0Visit
20Peptides NI£69.99£4.0010mg, 20mg, 30mgNo test reports found7.0Visit
21AJ Research Labs£60£5.0010mg, 20mgThird-party testing stated7.0Visit
22Red Panda Peptides£28.99£2.4010mg, 20mg, 30mgNo test reports found6.9Visit
23UK Peptide Co£70£2.6320mg, 40mgNo test reports found6.9Visit
24The Secret Beauty Store£210£4.2050mgNo test reports found6.8Visit
25Simply Peptides£45£4.5010mgNo test reports found6.8Visit
26Lumia Lab£69.95£5.2510mg, 20mg, 30mg, 40mgNo test reports found6.8Visit
27Peptide Vault£163.99£5.4730mg penNo test reports found6.8Visit
28Ultimate Peptides£140£3.5040mg penNo test reports found6.7Visit
29Vital Peptides£54.99£4.0010mg, 30mgNo test reports found6.7Visit
30Peak Peptides£54.99£4.4510mg, 20mgNo test reports found6.7Visit
31Peptiva Biohealth£119.99£4.7520mg, 40mgNo test reports found6.7Visit
32Peptide Products UK£89£6.2210mg, 20mg, 40mg, 40mg penNo test reports found6.6Visit
33Vitalis Labs£159.99£3.2050mgNo test reports found6.4Visit
34Pondok Peptides£59£5.9010mgNo test reports found6.4Visit
35Peptify UK£59.99£6.0010mgNo test reports found6.4Visit
36Next Day Peptides£70£8.405mgHPLC / COA claimed by supplier6.4Visit
37Biopro Store£120£4.1320mg pen, 40mg penNo COA shown on site6.3Visit
38Body Pharm UK£199£6.2232mgHPLC / COA claimed by supplier6.2Visit
39Nova Peptides£75£5.0010mg, 30mgNo test reports found6.1Visit
40Peptomera£140£7.0020mg penNo test reports found6.0Visit
41Polygon Peptides£69.99£7.0010mgNo test reports found5.8Visit
42UK Peptide Store£94.99£18.005mg, 10mgNo test reports found5.8Visit

See every retatrutide price by vial size →

Also tracked: 17 suppliers currently out of stock or unreachable

Blueprint Peptides (site unreachable) · GH Peptides (out of stock) · Global Peptides (site unreachable) · Intel Peptides (site unreachable) · Lucid Peptides (site unreachable) · MM Peptides (site unreachable) · My Reta (site unreachable) · Nova Peptide (out of stock) · Onvay Labs (out of stock) · Peptide Lab UK (site unreachable) · Peptides 4U (out of stock) · Precision Peptides (site unreachable) · Prime Peptides (out of stock) · Pulse Peptides (site unreachable) · R&D Peptides (site unreachable) · The Peptide Code (site unreachable) · The Peptides Outlet (site unreachable)

Why LeoLab is our #1 place to buy retatrutide in the UK

LeoLab isn’t the cheapest option, and the table above shows that. It ranks first because it scored highest on the factors that matter most when you can’t check a peptide yourself:

  • Two kinds of published testing. The retatrutide listing links to third-party purity results and a separate heavy-metal screen. Most competitors show one report or none.
  • A real UK footprint. A London (W1W) business address, published opening hours and a track record since 2018, while many competitors were registered in 2025–2026.
  • The widest range we found. 10mg, 15mg, 20mg, 30mg, 40mg, 50mg, 60mg vials, so you can match vial size to your protocol instead of overbuying.
  • Fast UK delivery. Royal Mail and DHL, 1–3 working days, with free shipping on larger orders.
  • Everything included. Free bacteriostatic water and syringes with every vial, plus a mixing and dosing guide for its own vial sizes.

Check LeoLab retatrutide prices

How we rank retatrutide suppliers

Every supplier with retatrutide in stock is scored out of 10 using public information from its own website and UK company records:

FactorWeightWhat we look for
Lab testing & transparency35%Independent, batch-specific COAs (e.g. Janoshik); heavy-metal / endotoxin screens
Business trust20%Registered UK company, published address, years trading, reviews
Price per mg20%Lowest in-stock price ÷ vial content, against the market
Range & availability15%Number of sizes actually in stock
Delivery10%Next-day / tracked 24 dispatch, clear shipping terms

Prices and stock are re-checked automatically. We don’t accept payment for placement. Some links earn us a commission, and that is how the site is funded. More on our methodology.

What to check before you buy retatrutide in the UK

  1. A batch-matched certificate of analysis. HPLC purity (ideally ≥98%) plus mass-spec identity confirming the molecule really is retatrutide. The batch number should match your vial.
  2. Independent testing. In-house or “manufacturer” COAs are weaker evidence than reports from independent labs such as Janoshik or MZ Biolabs.
  3. Contaminant screens. Heavy metals and endotoxins matter for any injectable research compound.
  4. Actual mg per vial. Some tests show under-filled or over-filled vials. Price per mg only means something if the fill is accurate.
  5. A traceable business. A registered company and address, rather than a Telegram handle only. Many UK peptide shops were incorporated in the last year.
  6. Avoid “pre-filled pens”. The MHRA has taken enforcement action against unlicensed weight-loss pen production in the UK.

Retatrutide in the UK: legal status in 2026

Retatrutide (LY3437943) is Eli Lilly’s investigational GIP/GLP-1/glucagon triple-receptor agonist. Phase 3 TRIUMPH trials have reported up to 28.3% average weight loss at 80 weeks, but the drug has no MHRA marketing authorisation and Lilly hasn’t filed for UK approval yet. UK suppliers sell it strictly as a research chemical. It isn’t a licensed medicine, and nothing on this site is medical advice.

If you want a prescribed weight-loss treatment today, licensed options such as tirzepatide (Mounjaro) and semaglutide (Wegovy) are available through the NHS and regulated UK pharmacies. Follow ournews coverage for the latest on retatrutide’s regulatory progress.

Frequently asked questions

Where is the best place to buy retatrutide in the UK?

In our 2026 comparison of 59 UK suppliers, LeoLab (leolab.co.uk) ranks #1. It publishes third-party purity and heavy-metal test results, has a London address, has traded since 2018 and stocks 7 vial sizes (10mg, 15mg, 20mg, 30mg, 40mg, 50mg, 60mg) with 1–3 day UK delivery. Budget buyers may prefer Power Peptides, which had the lowest price per mg in stock when we last checked.

How much does retatrutide cost in the UK?

Across the 42 UK suppliers with stock right now, a 10 mg vial costs between £21.50 and £179.99, and price per mg falls on larger vials. LeoLab charges £75 for 10mg. See our retatrutide price UK page for every size, last checked 9 October 2026.

Is retatrutide legal in the UK?

Retatrutide is an investigational medicine from Eli Lilly that is still in Phase 3 trials. It has no UK marketing authorisation, so no pharmacy or clinic can prescribe it. UK suppliers sell it as a research chemical labelled “not for human consumption”. Selling or supplying an unlicensed medicine for human use is an offence under the Human Medicines Regulations 2012.

What should I check before buying retatrutide?

Look for a recent, batch-specific certificate of analysis from an independent lab (HPLC purity and mass-spec identity), heavy-metal and endotoxin testing, a registered UK company with a real address, clear delivery terms and cold-chain-friendly packaging. Be wary of “pre-filled pens” and prices far below the market.

How often are prices updated?

Our price tracker re-checks every supplier’s retatrutide product pages automatically. Prices and stock on this page were last checked on 9 October 2026. Prices marked as verified were read directly from the supplier’s store on that date.

How do I work out a retatrutide dose in units?

Units on a U-100 insulin syringe depend on how much bacteriostatic water you add to the vial. Use our free retatrutide dosing calculator: enter the vial size, water volume and amount, and it shows the units to draw and how many doses the vial holds.

Latest retatrutide & peptide news