Retatrutide UK — Triple Agonist Research Peptide
Retatrutide is the most talked-about research peptide of the current GLP-1 era. As a triple receptor agonist hitting GLP-1, GIP and glucagon receptors simultaneously, it represents a step-change in metabolic research — and Peptides UK 4U stocks it in 20mg and 40mg vials, dispatched same-day from the UK.
What makes Retatrutide different?
Where Semaglutide hits one receptor and Tirzepatide hits two, Retatrutide is the first widely-available triple agonist. The addition of glucagon receptor activity differentiates it from earlier GLP-1 analogues and is the reason it's the focus of the current generation of metabolic studies.
Vial sizes & purity
- Retatrutide 20mg — ideal for shorter research protocols or first evaluation.
- Retatrutide 40mg — best value per mg, suited to extended studies.
- Independently HPLC tested at 99%+ purity.
- Lyophilised in sealed, tamper-evident vials.
Reconstitution
Reconstitute with bacteriostatic water — typically 2–4ml depending on your dosing protocol. Use our free peptide reconstitution calculator to determine exact volume and units per dose. Refrigerate reconstituted product and use within 28 days.
UK dispatch
Orders placed before 2pm UK time ship the same working day via Royal Mail Tracked. Discreet plain packaging, no customs delays, no overseas waiting times.
Browse related products
View full shopFrequently asked questions
What is Retatrutide?
Retatrutide is a synthetic peptide and triple receptor agonist targeting GLP-1, GIP and glucagon receptors. It is the newest compound in the metabolic research peptide space and is studied for its multi-receptor activity.
Where can I buy Retatrutide in the UK?
Peptides UK 4U stocks Retatrutide in 20mg and 40mg vials, dispatched next-day from the UK with full tracking. All vials are independently HPLC tested.
Is Retatrutide legal in the UK?
Retatrutide is legal to purchase and possess for laboratory research purposes in the UK. It is not a licensed medicine and is strictly for research use only.
What size Retatrutide should I get?
We stock 20mg and 40mg vials. The 40mg vial offers better value per mg for ongoing research; the 20mg is ideal for shorter studies or first-time evaluation.
How do I reconstitute Retatrutide?
Add bacteriostatic water to the lyophilised vial slowly down the side. Once dissolved, store at 2–8°C and use within 28 days. Our peptide calculator gives exact volumes.
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.