NEW COAs JUST LANDED — 99% purity across every GLP-1 compound•Independently lab-tested by Analiza Bialek European testing•Third-party verified identity & purity — every compound, every time•The real deal. Traceable compound numbers. Downloadable certificates.•View the latest Certificates of Analysis →•NEW COAs JUST LANDED — 99% purity across every GLP-1 compound•Independently lab-tested by Analiza Bialek European testing•Third-party verified identity & purity — every compound, every time•The real deal. Traceable compound numbers. Downloadable certificates.•View the latest Certificates of Analysis →•
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Research Library

What is Retatrutide?

Retatrutide (also spelled retratitude, retuatide, retatrtide) is the newest generation of incretin research peptide — a triple agonist hitting GLP-1, GIP and glucagon receptors. It is currently the most powerful compound in the class.

How Retatrutide works

Semaglutide is a single agonist (GLP-1). Tirzepatide is a dual agonist (GLP-1 + GIP). Retatrutide adds a third receptor — glucagon — which raises energy expenditure alongside the appetite-suppression effects of the other two. That third mechanism is why Retatrutide research has produced the largest weight-loss numbers in the class to date.

Retatrutide vs Tirzepatide vs Semaglutide

  • Semaglutide — GLP-1 only. Established, well-studied, moderate weight-loss effect.
  • Tirzepatide — GLP-1 + GIP. Larger effect than Semaglutide in head-to-head data.
  • Retatrutide — GLP-1 + GIP + glucagon. Highest reported weight-loss effect; still in late-stage trials.

See the full breakdowns: Retatrutide vs Tirzepatide · Retatrutide vs Semaglutide.

Retatrutide research dosing

Trial protocols typically start low and titrate up over weeks. Use our peptide calculator to work out exact draw volume from any vial size + bac water combination. Full dosing reference on the Retatrutide dosage chart.

Where to buy Retatrutide in the UK

We stock Retatrutide in the UK in 10mg, 15mg, 30mg and 40mg vials, plus pre-filled Retatrutide pens. Every batch is HPLC-tested to 99%+ purity with a batch-matched Certificate of Analysis linked from the product page. Next-day UK dispatch, discreet packaging.

For laboratory and research use only. Not for human consumption. Not for medical, veterinary or cosmetic use.

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