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Catalogue / Research Pens / Retatrutide Pen
Retatrutide Pen vial, Connect Peptides
Retatrutide Pen Retatrutide Pen Retatrutide Pen
In stock UK dispatch 24h

Retatrutide Pen

GLP-1 / GIP / glucagon triple agonist, ready-to-use pen · 4731.3 g/mol · CAS 2381089-83-2
Buy Retatrutide in a prefilled pen in the UK — a GLP-1 / GIP / glucagon triple receptor agonist supplied ready-to-use for laboratory research, no reconstitution required. Prefer a lyophilised vial instead? See Retatrutide vial — available in 20mg, 30mg and 40mg.
99.2%
HPLC purity
4731.3
g/mol
Pass
Mass spec ID
Vial size
Also available as Vial

What is Retatrutide Pen?

Retatrutide (LY3437943) is a synthetic 39-amino-acid peptide acting as a triple agonist at the GLP-1, GIP and glucagon receptors, studied as a single molecule engaging three incretin pathways simultaneously.

This pen is filled at a fixed 20mg/30mg/40mg concentration and QC-released against the same HPLC and mass-spectrometry checks as the vial — the only difference is the format, so no weighing or bacteriostatic water is needed here.

Storage & handling

Storage
Keep refrigerated at 2–8 °C, in line with other prefilled research pens. Use within 10 weeks of first use. Avoid leaving the pen out of the fridge for extended periods, and keep it away from direct heat and light.

Frequently asked questions

What's the difference between the vial and the pen?

Same peptide and purity — the pen is premixed and ready to use, no reconstitution needed.

How much is the Retatrutide pen in the UK?

Pricing varies by pen strength — current prices for each size are shown on this page when you select a strength above.

Where can I buy a Retatrutide pen?

Connect Peptides stocks the Retatrutide pen ready-to-use, HPLC-verified with a batch COA, dispatched within 24 hours on UK orders.

Specification
CAS2381089-83-2
SynonymLY3437943
Mol. weight4731.3 g/mol
Residues39 amino acids
FormPrefilled pen
SolventBacteriostatic water
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Research guides
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Supplied strictly as a laboratory reference material for in-vitro research. Not a medicine, food or cosmetic. Not for human or veterinary consumption, diagnostic or therapeutic use.