Verified
Vials in perfect condition
Site was easy to use, checkout was fast, and the product arrived exactly when they said it would. Straightforward, no drama, high quality.
James H.London, UK · 30 Jun 2026
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Peptides
Metabolic Research
Best seller
In stockRetatrutide
HPLC purity 99.75% · View certificate ↗5 mg · ≥99% purity
4.9
Triple-agonist research peptide (GLP-1 / GIP / glucagon).
£89.99£94.99GBPSave 5%
£89.99 per vial · Tax calculated at checkout · Free tracked UK & EU shipping over £50
Size 3 options
Bundle & saveVolume discount applied automatically
1
We accept
≥99% purity
3rd-party HPLC
CoA per batch
Fast UK shipping
Quality guarantee
Every batch is independently HPLC assayed. Certificate of Analysis available on request.
Every UK order includes — free
- ✓Bacteriostatic water — laboratory diluent
- ✓Batch certificate of analysis (HPLC)
- ✓Discreet, unbranded packaging
- ✓Tracked delivery — free on orders over £50
Full refund
if a batch is off-spec
Free reship
if lost or damaged in transit
Same-day dispatch
Mon–Fri, order before 12:00 UK
Research use only
for laboratory work
Analytical data
Specifications, documented.
Identity data cross-checked against PubChem; purity taken from the batch certificate of analysis.
CompoundRetatrutide
Also known asLY3437943
Molecular formulaC₂₂₁H₃₄₂N₄₆O₆₈
Molecular weight4731.42 g/mol
CAS number2381089-83-2
PubChem CID171390338
Purity (HPLC)99.75% — batch certificate of analysis
FormLyophilised powder, sealed glass vial
SolubilityBacteriostatic or sterile water
Storage−20 °C lyophilised, protected from light
About this compound
Retatrutide
Triple GIP / GLP-1 / glucagon analogue
Half-life
≈ 6 days
First disclosed
2022
Retatrutide (LY3437943) is an investigational tri-agonist peptide activating the GIP, GLP-1 and glucagon receptors. Published data place it among the most potent incretin compounds reported in laboratory metabolic-pathway research.
Balanced triple-receptor agonism is studied in vitro for combined incretin- and glucagon-receptor signalling.
Research areas
Glucagon receptor signallingIncretin-pathway modelsPeptide pharmacology
Research literature
Research notice: supplied strictly as laboratory research material for in-vitro use. Not for human or veterinary use, and not a medicine, food or cosmetic. This page gives identification and quality information only — no usage instructions or medical advice.
Browse this research area
Retatrutide is an investigational triple receptor agonist targeting GLP-1, GIP and glucagon receptors, supplied by MyPeptides for laboratory research use only.
Retatrutide (LY3437943) is an investigational tri-agonist peptide that activates the GIP, GLP-1 and glucagon receptors. Its molecular formula is C₂₂₁H₃₄₂N₄₆O₆₈ (≈4731 g/mol) and it is catalogued in PubChem as CID 171390338.
It is supplied as lyophilised 5 mg and 10 mg vials and as a 40 mg pre-filled research pen. The batch certificate of analysis on this page shows the HPLC purity for each vial size.
Laboratories use retatrutide alongside semaglutide, tirzepatide and mazdutide to compare single-, dual- and triple-receptor incretin pharmacology — see the GLP-1 & incretin range. Store vials at −20 °C, protected from light. For in-vitro research use only.
Retatrutide — frequently asked questions
Straight answers on purity, handling, dispatch and research use.
What is Retatrutide?
Retatrutide is an investigational triple receptor agonist targeting GLP-1, GIP and glucagon receptors, supplied by MyPeptides as a lyophilised research vial for laboratory research use only.
What is Retatrutide used for in research?
In cited literature, Retatrutide is studied in metabolic, body-composition and incretin-signalling research. It is not a medicine and is not intended for human or veterinary use.
What purity is MyPeptides Retatrutide?
Every batch is third-party HPLC assayed at ≥99% purity. A signed certificate of analysis is available on request after checkout.
How is Retatrutide reconstituted and stored?
Ships lyophilised in a sealed borosilicate vial. Store at −20 °C; reconstitute with bacteriostatic or sterile water immediately before in vitro use.
Do you ship Retatrutide to the UK and EU?
Yes — tracked Royal Mail and DPD dispatch across the UK and EU, with free shipping on orders over £50. Weekday orders placed before 12:00 UK time ship the same day.
Retatrutide reviews
Verified feedback from qualified researchers across the UK & EU.
4.8(6 reviews)
Swipe
Verified
Vials in perfect condition
Site was easy to use, checkout was fast, and the product arrived exactly when they said it would. Straightforward, no drama, high quality.
James H.London, UK · 30 Jun 2026
Verified
Quality packaging, quick dispatch
Clean product, no discoloration, correct fill. Certificate of analysis was in the box AND emailed. Very straightforward experience.
Sofia R.Madrid, ES · 7 Jul 2026
Verified
Fast UK shipping
The little details matter - proper cold-chain, tamper-evident seals, and a CoA that actually reads like a lab report and not a marketing sheet.
Chloe D.Lyon, FR · 16 Jul 2026
Verified
Solid product, will reorder
Ordered late Monday, arrived Wednesday morning in the UK. Packaging was cold-protected and every vial sealed correctly. CoA matched the batch number on the label.
Lena P.Amsterdam, NL · 26 May 2026
Professional service end to end
Been using peptides for research for years and MyPeptides is now my go-to. Consistent quality, quick turnaround, real documentation.
Daniel B.Milan, IT · 2 May 2026
Verified
Arrived quickly, well protected
Third order from MyPeptides. Purity and appearance are consistent across batches. The paperwork is genuinely useful - mass, structure and CAS all included.
Mia L.Stockholm, SE · 6 Jun 2026
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