Retatrutide (LY3437943) is a synthetic triple agonist of the GLP-1, GIP and glucagon receptors developed by Eli Lilly. It is currently a Phase 3 clinical research compound studied for metabolic and adipose tissue research. UK Peptides supplies retatrutide as lyophilised powder with ≥98% HPLC-UV purity and a batch-matched Certificate of Analysis.

Is Retatrutide legal to buy in the UK for research?

Yes. Retatrutide is legal to purchase in the United Kingdom for in-vitro laboratory research purposes only. It is not a licensed medicine, is not approved by the MHRA for human or veterinary use, and is not scheduled under the Misuse of Drugs Act 1971. Buyers must be 18 or over and ordering for legitimate research.

How should Retatrutide 10mg be stored?

Store the lyophilised vial at -20°C in its original sealed packaging, protected from light and moisture. After reconstitution with bacteriostatic water, store at 2–8°C and use within 28 days. Do not refreeze after reconstitution.

What purity is UK Peptides Retatrutide?

Every Retatrutide 10mg vial is independently tested to ≥98% HPLC-UV purity by Janoshik Analytical or Aspen Bioanalytics, with mass spectrometry identity confirmation. The signed Certificate of Analysis is linked from this product page.

How fast is dispatch for Retatrutide orders?

Orders placed before 3pm GMT Monday to Friday are dispatched the same working day from Manchester via Royal Mail Tracked 24, in an insulated mailer with ice packs to maintain cold chain.

For Research Purposes Only · Not For Human Consumption

Must be 18+ · COA On Every Vial · Royal Mail Tracked

COA On Every Single Vial

Research Use Only · Not For Human Consumption

Shipped from Manchester, UK

Independently Tested · Janoshik & Aspen Bio

Stored at −20°C Until Dispatch

Home/Shop/Retatrutide 10mg

Best Seller≥98% (HPLC-UV)

Batch LX-2501

Third-party tested

CoA available

UK dispatched

4.9· 247 verified reviews

Metabolic Research

Buy Retatrutide 10mg UK | Research Grade

Name: Retatrutide 10mg
Brand: UK Peptides
SKU: UKP-RETA-10MG
Price: 59.99 GBP
Availability: InStock
Rating: 4.9 (5247 reviews)

Triple-receptor GLP-1, GIP and glucagon agonist. Retatrutide is the most advanced metabolic research peptide currently available, supplied as lyophilised powder with a batch-matched Certificate of Analysis.

Vial size

10mg£59.99 20mg£99.99

£59.99

In stock

Inc. VAT · Free UK shipping on orders over £50

✓ Free shipping on this order

SSL encrypted · Same-day dispatch before 3pm · CoA on this lot

Order within 9hrs 7min for same-day dispatch

What ships with your order

1 × Retatrutide 10mg — lyophilised, sealed glass vial.
Signed CoA for batch LX-2501 — HPLC-UV purity + mass-spec identity, by Janoshik Analytical.
Cold-chain insulated mailer — ice pack included, vial stays <10°C in transit.
Royal Mail Tracked 24 — same-day dispatch on orders before 3pm GMT, Mon–Fri.

Research Compound

About Retatrutide

Retatrutide (LY3437943) is a triple agonist targeting GLP-1 (glucagon-like peptide-1), GIP (glucose-dependent insulinotropic polypeptide), and glucagon receptors simultaneously. Developed by Eli Lilly, retatrutide entered Phase 2 clinical trials in 2022 and Phase 3 trials in 2023. In Phase 2 data published in the New England Journal of Medicine (Jastreboff et al., 2023), participants receiving the highest dose demonstrated a mean body weight reduction of 17.5% at 24 weeks. UK Peptides supplies retatrutide strictly for in-vitro and preclinical laboratory research. This compound is not approved for human use and is not a licensed medicine.

Research areas

GLP-1/GIP/glucagon receptor signalling
Metabolic pathway modelling
Adipogenesis & lipid metabolism
In-vitro obesity models

Certificate of Analysis

Retatrutide 10mg

Independent lab: Janoshik Analytical
Batch number: LX-2501
Method: HPLC-UV + MS
Result: ≥98% (HPLC-UV)

The CoA you download is the exact certificate produced for this lot — no edits.

Storage & handling

Keep it stable, keep it sterile

Storage: Store lyophilised powder at -20°C in a sealed vial. Protect from light and moisture. Allow the vial to reach room temperature before opening to prevent condensation entering the vial. Do not store in a frost-free freezer. Reconstitution: Reconstitute using bacteriostatic water (0.9% benzyl alcohol). Add solvent slowly down the side of the vial — do not shake. Allow to dissolve gently at room temperature. Reconstituted stability: Once reconstituted, store at 2–8°C (refrigerated). Use within 28 days. Do not refreeze after reconstitution. Shipping: All vials are dispatched in insulated mailers with ice packs to maintain cold chain during Royal Mail Tracked 24 transit.

+ Add Bacteriostatic Water (£4.99) →

Customer reviews

Trusted by 5,247 verified researchers

4.9

out of 5

Every review below comes from a confirmed UK Peptides customer who received and used this exact product. We do not edit, filter or remove low ratings.

5 star
92%
4 star
6%
3 star
1%
2 star
0.5%
1 star
0.5%

Verified
"Have stopped sourcing Retatrutide 10mg from anywhere else. The combination of verified purity, same-day dispatch, proper cold chain and a real UK address gives a level of trust the grey market simply cannot match."
M. Yusuf · 2025-05-29
Verified
"Ordered Retatrutide 10mg on behalf of a university research group. Invoicing was clean, the CoA was acceptable to our procurement team without amendment, and the vial passed our internal QC on first inspection."
Dr. K. Sandhu · 2025-05-22
Verified
"The vial of Retatrutide 10mg arrived intact, lot number matched the CoA, and reconstitution behaved exactly as expected. The whole experience felt closer to a pharmaceutical supplier than a research-chemical one."
J. Harkness · 2025-05-15
Verified
"Honestly the most professional UK peptide source I have used in six years of lab work. The Retatrutide 10mg batch was clean, documentation thorough, and customer service answered an analytical question within hours."
R. Beaumont · 2025-05-08
Verified
"Verified the Retatrutide 10mg lot against an external reference standard — identity and purity both within published spec. Same-day dispatch from Manchester, well-packed, no transit damage. Will be reordering."
Dr. S. El-Hadid · 2025-05-01
Verified
"Ordering Retatrutide 10mg from UK Peptides is now a routine line item in our monthly research budget. Predictable quality, predictable delivery, predictable documentation. That is exactly what a working lab needs."
T. Vasquez · 2025-04-24

FAQ

Retatrutide 10mg — common questions

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Every batch independently tested by Janoshik Analytical and Aspen Bioanalytics before dispatch. Signed certificates available on every product page.

Legal notice

This product is sold strictly for in-vitro laboratory research purposes only. It is not approved for human or veterinary use, is not a drug, food, or cosmetic, and should not be misused as such. UK Peptides accepts no liability for misuse. By purchasing you confirm you are a qualified researcher aged 18 or over.