Premium RetatrutideSourced From The UK.
High-purity, lab-tested Retatrutide. Available in vials and pre-loaded pens. Fast UK dispatch. Certificate of Analysis available upon request.
Choose Your Vial.
All vials are lyophilised, ≥98% purity. CoA available on request.
10mg Vial
10mg lyophilised
Entry-level vial for initial research. Ideal for protocol testing and dose calibration.
20mg Vial
20mg lyophilised
Most ordered vial size. Optimal for extended research protocols and best value per milligram.
30mg Vial
30mg lyophilised
High-volume vial for sustained research programmes. Lowest cost per milligram.
The Triple Agonist
Setting A New Standard.
Retatrutide (RETA) is a next-generation GLP-1/GIP/glucagon triple receptor agonist currently in advanced clinical trials. Reta Source UK supplies pharmaceutical-grade Retatrutide for research purposes, with full documentation and UK-based dispatch.
Research-Grade Purity
Every batch independently tested. ≥98% purity minimum, with full Certificate of Analysis available on request.
UK Sourced & Verified
Sourced through verified UK supply chains. Compliant storage, handling, and dispatch on every single order.
Fast, Discreet Dispatch
Orders dispatched same or next working day. Discreet packaging as standard. Tracked UK delivery.
Tools & Guides.
Everything you need to research, reconstitute, and dose correctly.
Retatrutide Dose Calculator
Injection volume, syringe units & vial supply
Inject volume
0.100
ml
Syringe units
10.0
IU (U-100)
Doses per vial
20
injections
Weeks supply
6.7
weeks
U-100 insulin syringe scale (0–100 IU)
For research purposes only. Calculations based on U-100 insulin syringe. Always verify independently before use.
What Is Retatrutide? A Researcher's Introduction
Retatrutide (LY3437943) is a triple agonist targeting GLP-1, GIP, and glucagon receptors. Covers mechanism, research applications, and what makes it distinct from earlier GLP-1 compounds.
How To Reconstitute Peptide Vials Correctly
Step-by-step guide to reconstituting lyophilised peptide vials using bacteriostatic water. Covers sterile technique, storage, and common errors to avoid.
Understanding Purity & Certificate of Analysis
What ≥98% purity actually means, how to read a CoA, and why HPLC-verified peptides matter for reliable research outcomes.
Peptide Storage: Lyophilised vs Reconstituted
Lyophilised peptides are stable for months at room temperature; reconstituted vials require refrigeration. Full breakdown of optimal storage to maintain potency.
Quality You Can Verify.
Six reasons researchers and practitioners choose Reta Source UK.
≥98% Purity Guaranteed
Every vial independently tested at a third-party ISO-accredited lab. Purity confirmed before dispatch, no exceptions.
CoA available on request
CoA available upon request. Batch number, purity percentage, and testing methodology included.
UK Compliant Supply
Sourced, stored, and dispatched within the UK under compliant conditions. Proper cold-chain handling as standard.
Same-Day Dispatch
Orders placed before 2pm dispatched same day. Tracked, insured, and discreetly packaged for your peace of mind.
Transparent Pricing
No hidden fees. Clear per-vial pricing with bulk discounts. BAC Water bundles priced fairly with no markup games.
Expert Support
UK-based team available for reconstitution guidance, dosing protocol questions, and order support.
Trusted By Researchers.
What scientists and research professionals say about Reta Source UK.
"Purity levels are consistently above what is stated. The documentation is thorough and the dispatch is genuinely same-day when ordered before the cutoff. One of the few suppliers I trust for repeat orders."
"Ordered twice now. Both times the product arrived well-packaged and within 24 hours. The reconstitution guide is clear and the support team responded within the hour when I had a protocol question."
"The 20mg vial is exceptional value per milligram. CoA was provided promptly on request and matched the stated purity exactly. This is the standard other suppliers should be held to."
"Switched from a European supplier and won't be going back. UK dispatch, clear pricing, no hidden costs. The BAC Water bundle is convenient and fairly priced. Highly recommend."
"Purity levels are consistently above what is stated. The documentation is thorough and the dispatch is genuinely same-day when ordered before the cutoff. One of the few suppliers I trust for repeat orders."
Order To Door In Four Steps.
A seamless, fully tracked process from order through to delivery.
Order
Select your vial size or pen option. Add BAC Water if needed. Checkout takes under two minutes.
Verified
Order confirmed and batch assigned. Your order is confirmed and batch assigned. Certificate of Analysis available upon request.
Dispatched
Dispatched same or next working day in cold-chain compliant, discreet packaging with a tracked label.
Delivered
Delivered to your door within 1–2 working days. Reconstitution guide included in every parcel. CoA available upon request.
Common Questions.
Everything you need to know about Retatrutide and ordering from us.
Reta Source UK supplies Retatrutide for research purposes only. Not for human consumption. For research use only.
Order Retatrutide
From Reta Source UK.
≥98% purity. CoA available upon request. Same-day dispatch on UK orders placed before 2pm.