GLP-1 Peptides

GLP-1 Research Peptides UK

GLP-1 research peptides are the most-studied class of metabolic compounds in modern research. Peptides UK 4U supplies the three benchmark GLP-1 analogues used in laboratory studies — Retatrutide, Semaglutide and Tirzepatide — all independently lab-tested and dispatched from the UK.

Whether your research involves single, dual or triple receptor agonism, our catalogue covers the full GLP-1 landscape at 99%+ purity, sealed and traceable.

Retatrutide — triple receptor agonist

Retatrutide is the newest and arguably most exciting compound in the GLP-1 research space. As a triple agonist targeting GLP-1, GIP and glucagon receptors, it represents the leading edge of metabolic peptide research. Available in 20mg and 40mg vials.

Semaglutide — the established benchmark

Semaglutide is the most-researched GLP-1 analogue with years of laboratory data behind it. A single GLP-1 receptor agonist, it remains the reference compound against which newer analogues are compared. Supplied in 30mg vials.

Tirzepatide — dual GIP/GLP-1 agonism

Tirzepatide combines GLP-1 and GIP receptor agonism in a single molecule. Extensively studied for its metabolic profile, it sits between Semaglutide and Retatrutide in the GLP-1 research landscape. Available in 20mg and 40mg.

Reconstitution & storage

All GLP-1 peptides ship lyophilised. Reconstitute with bacteriostatic water (we stock 10ml vials), store reconstituted product at 2–8°C and use within 28 days. Use our peptide calculator to work out reconstitution volumes and doses.

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Frequently asked questions

What are GLP-1 research peptides?

GLP-1 (glucagon-like peptide-1) research peptides are synthetic analogues of the natural GLP-1 hormone, including Semaglutide, Tirzepatide and Retatrutide. They are studied for their effects on glucose regulation and metabolism in laboratory settings.

What's the difference between Semaglutide, Tirzepatide and Retatrutide?

Semaglutide is a single GLP-1 receptor agonist. Tirzepatide is a dual agonist targeting both GLP-1 and GIP receptors. Retatrutide is a triple agonist hitting GLP-1, GIP and glucagon receptors — making it the newest and most-studied of the three in research.

Which is the most researched GLP-1 peptide?

Semaglutide has the longest research history, Tirzepatide has extensive metabolic data, and Retatrutide is the focus of current cutting-edge studies due to its triple-receptor profile.

Do you ship GLP-1 peptides to the UK?

Yes — all GLP-1 research peptides are dispatched from our UK facility with next-day Royal Mail tracked delivery. No customs risk, no delays.

What purity are your GLP-1 peptides?

All our GLP-1 research peptides — Retatrutide, Semaglutide and Tirzepatide — are independently HPLC verified at 99%+ purity, with certificates of analysis available.

Disclaimer: All products sold by Peptides UK 4U are for laboratory and research purposes only. They are not intended for human or animal consumption, diagnosis, treatment or prevention of any disease.