For laboratory research use only, not for human or veterinary use
Same-day dispatch before 2pm (Mon–Fri)
pepts.
Metabolic

Retatrutide · UK research stock

5/5(1 review)

Investigational triple GIP/GLP-1/glucagon receptor agonist for metabolic research.

Retatrutide 10 mg research vial

Size

£44.99

SKU RETA-10 · In stock

Quantity

1

Bundle & Save

Same-day dispatch on orders before 2pm (Mon–Fri) · Royal Mail Tracked 24

Free shipping on orders over £80

Free research vial with every order over £120

Independently tested in the UK

Marfleet Analytical logo

100% purity

Tested 6 Oct 2026 · Batch received 15 Sept 2026

A vial picked at random from the batch we hold, tested by Marfleet Analytical for identity, purity and peptide content.

Manufacturer's certificate of analysis

Janoshik logo

99.861% purity

Tested 22 Jun 2026 · Batch received 28 Sept 2026

The manufacturer's certificate of analysis for the batch we hold, with the supplier's details blurred. The full certificate is available on request.

Ask us
Research use only. This product is sold strictly for in-vitro laboratory research by qualified professionals. It is not for human or veterinary use.

The evidence, explained

About Retatrutide

Retatrutide (LY3437943) is Eli Lilly's investigational triple agonist, a single peptide engineered to activate the GIP, GLP-1 and glucagon receptors simultaneously. It is currently the most requested metabolic research compound in the UK, following phase 2 results that reported the largest weight reductions seen in an obesity trial to date.

Research areas

Incretin-receptor pharmacology across all three target receptors; energy-expenditure and appetite-signalling models; and comparative studies against single (semaglutide) and dual (tirzepatide) agonists. Retatrutide remains investigational, it is in phase 3 trials and holds no MHRA or FDA marketing authorisation.

Supplied as lyophilized powder in a sealed glass vial. Store lyophilized vials at -20°C away from light and moisture; short-term storage at 4°C is acceptable. UK orders placed before 2pm on business days are dispatched the same day in discreet, protective packaging with tracked delivery.

For laboratory research use only. This product is not a drug, food, or supplement and is not intended for human or veterinary use of any kind.

Specifications

Also sold as

LY3437943Reta

Research area

Metabolic

Purity

≥99%

Form

Lyophilized powder

Sizes

10 mg · 20 mg · 30 mg · 40 mg · 50 mg · 60 mg

CAS number

2381089-83-2

Storage

Store at -20°C. Keep away from light.

Additional information

Sizes, codes and availability
SizeSKUPriceAvailability
10 mgRETA-10£44.99In stock
20 mgRETA-20£74.99In stock
30 mgRETA-30£99.99In stock
40 mgRETA-40£134.99Out of stock
50 mgRETA-50£153.99In stock
60 mgRETA-60£169.70In stock

Dispatch and delivery

Orders placed before 2pm Monday to Friday are dispatched the same day, by Royal Mail Tracked 24 in discreet packaging.

Shipping is £4.99, free on orders over £80.

A free research vial comes with every order over £120. Full size, off our own shelf and sealed. We choose which one, and you find out when you open the box.

Shipping and returns

Storage and handling

Supplied as lyophilized powder · 6 sizes.

Storage Store at -20°C. Keep away from light.

Reconstitution solvents and the rest of the bench consumables are in Lab Essentials, and the FAQ covers handling questions.

Research use only. Sold strictly for in-vitro laboratory research by qualified professionals. Not for human or veterinary use.

Tags

triple agonistincretin researchinvestigational

Published research

Literature and regulatory sources relating to Retatrutide. The numbered markers in the description link to the entry they support, and every link opens on the publisher's own site.

  1. N
    [1]Triple-hormone-receptor agonist retatrutide for obesity, a phase 2 trial
    New England Journal of Medicine2023Clinical (Phase 2)

    pubmed.ncbi.nlm.nih.gov

  2. C
    [2]LY3437943, a novel triple glucagon, GIP, and GLP-1 receptor agonist: from discovery to clinical proof of concept
    Cell Metabolism2022Translational

    pubmed.ncbi.nlm.nih.gov

  3. P
    [3]All published retatrutide research on PubMed
    PubMed (NIH)Index

    pubmed.ncbi.nlm.nih.gov

Questions about Retatrutide

What purity is Retatrutide?

Retatrutide is synthesised to a ≥99% purity specification and supplied as lyophilized powder in a sealed glass vial. The specification is the standard the compound is made to, and it is listed with the rest of its specifications on this page.

Is there a certificate of analysis for Retatrutide?

Yes. A vial of Retatrutide 10 mg was tested by an independent laboratory on 6 October 2026, and its certificate is shown on this page under the price of that size. Every published certificate is also listed on our Quality page.

How should Retatrutide be stored?

Store at -20°C. Keep away from light. Lyophilized vials keep best at -20°C, protected from light and moisture; short-term storage at 4°C is acceptable, and the powder is stable at room temperature for the time it spends in the post.

What comes with Retatrutide?

Each unit is one sealed glass vial of lyophilized powder. Nothing to reconstitute it with is included: bacteriostatic water and the rest of the bench consumables are sold separately under Lab Essentials.

How fast is UK delivery?

Orders placed and paid before 2pm on a business day (Monday to Friday, excluding UK public holidays) are dispatched the same day via Royal Mail Tracked 24 in discreet, protective packaging, and arrive usually the next working day after dispatch. Standard shipping is £4.99, free on orders over £80, and orders over £120 arrive with a free research vial. We ship within the United Kingdom only.

Can I change my mind and return an order?

If you are buying as a consumer, yes: you have 14 days from delivery to cancel, without giving a reason, under the Consumer Contracts Regulations 2013. Tell us within 14 days, send the sealed vials back within 14 days, and we refund the goods plus the original delivery charge within 14 days. Return postage is at your cost unless the item was faulty or wrong. Opened vials are the one exception: our vials are sealed sterile, and regulation 28(3)(b) puts sealed goods that cannot be resold once unsealed, for health and hygiene reasons, outside the cancellation right.

Is Retatrutide for human use?

No. Retatrutide is supplied strictly for in-vitro laboratory research by qualified professionals. It is not a drug, food, cosmetic or supplement, it is not intended for human or veterinary use, and we do not provide dosage or administration guidance of any kind.

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Reviews

What UK researchers say about Retatrutide.

  • Great

    Arrived in good time and the product was great. Definitely ordered from here again.

    Retatrutide · 05/10/2026