Delivered with clinical precision.
Retatrutide (LY3437943) is an investigational triple GLP-1/GIP/glucagon agonist supplied for laboratory research use only — not for human use and not approved by the MHRA. We stock it as Body Pharm 32mg and 64mg multi-dose pens, batch-tested and cold-chain dispatched across the UK for researchers.
See how it compares in our Retatrutide vs Tirzepatide and Retatrutide vs Semaglutide guides.
Strength
32 mg / 64 mg
Format
Pre-filled pen
The Range
Every Body Pharm Retatrutide pen ships in tamper-evident packaging from our UK facility, with batch number and Certificate of Analysis traceability. Comparing options? Read Retatrutide vs Tirzepatide (Mounjaro) or Retatrutide vs Semaglutide (Ozempic / Wegovy).
Most popularBody Pharm
The standard Body Pharm 32mg multi-dose pen — ideal for ongoing research protocols and steady titration schedules.
£220
£250
Extended supplyBody Pharm
The high-capacity Body Pharm 64mg pen — fewer reorders, longer protocols, identical clinical-grade fill and finish.
£350
£400
The Compound
Retatrutide (LY3437943) is one of the most studied next-generation peptides in clinical development. We supply it for in-vitro research only, under documented cold-chain controls.
Retatrutide is an investigational triple agonist of the GLP-1, GIP, and glucagon receptors — a novel pharmacological profile under active clinical study.
The Body Pharm pen mirrors the format used in pharmaceutical trials — adjustable dose dial, sealed cartridge, single-use needle compatibility.
Each batch is independently HPLC-assayed for purity and concentration. Certificates of Analysis are available on request from our compliance team.
Clinical context
Researchers and clinicians often weigh Retatrutide against the leading GLP-1 and multi-agonist alternatives. See the head-to-head data on efficacy, dosing and mechanism.
Comparison guide
Triple agonist vs the original GLP-1. Compare Retatrutide to Ozempic and Wegovy across weight loss outcomes, dosing schedules and UK availability.
Read comparisonComparison guide
Triple agonist vs dual agonist. See how Retatrutide stacks up against Mounjaro on trial data, side-effect profiles and mechanism of action.
Read comparisonWhy Retatrutide UK
| Standard | Retatrutide UK | Typical reseller |
|---|---|---|
| Source | Direct from Body Pharm | Unverified resellers |
| UK dispatch | Same-day from UK facility | Border delays, customs risk |
| Cold chain | 2–8°C insulated dispatch | Ambient shipping common |
| Batch testing | Independent HPLC + COA | Often unverified |
| Format | Genuine multi-dose pen | Loose vials, no metering |
Process
01
Select the 32mg or 64mg Body Pharm pen and complete checkout. Orders placed before 2pm dispatch the same business day.
02
Your pen is packed in a 2–8°C insulated mailer with temperature indicator and tracked via Royal Mail Special Delivery.
03
Plain outer packaging, no branded markings, signed delivery — typically next business day across the UK.
Trusted by researchers
Verified orders · Dispatched from the UK · Cold-chain delivered
"Cold-chain packaging arrived in perfect condition — temperature indicator strip was still in spec. Body Pharm pen exactly as described."
Dr A. Whitfield
Research lead · Manchester
"Switched from a vials-only supplier. The metered pen alone is worth it. Dispatched same day, with me before 10am."
M. Patel
Independent researcher · London
"Asked for a Certificate of Analysis after ordering — received it within the hour. That's the difference between a source and a reseller."
K. O'Sullivan
Lab manager · Dublin
"Plain outer packaging, signed delivery, batch number matched the COA. Exactly what a UK supply should look like."
J. Reed
Sports-medicine clinic · Leeds
"Comparison guides on the site convinced me. Ordered the 64mg pen for the full titration — no need to reorder mid-protocol."
S. Banerjee
PhD candidate · Edinburgh
"Honestly the best peptide supply experience I've had in the UK. Tracked Royal Mail Special, cold mailer, real support email."
T. Hargreaves
Researcher · Bristol
"Pen worked flawlessly out of the fridge. Dose dial is smooth, no resistance. Far better than reconstituting from raw vials."
Dr R. Chen
Clinical research · Birmingham
"Ordered Friday at 1:30pm — pen arrived Saturday before 11am. Cold-chain held perfectly across the weekend."
L. Andrews
Independent researcher · Glasgow
"Cold-chain packaging arrived in perfect condition — temperature indicator strip was still in spec. Body Pharm pen exactly as described."
Dr A. Whitfield
Research lead · Manchester
"Switched from a vials-only supplier. The metered pen alone is worth it. Dispatched same day, with me before 10am."
M. Patel
Independent researcher · London
"Asked for a Certificate of Analysis after ordering — received it within the hour. That's the difference between a source and a reseller."
K. O'Sullivan
Lab manager · Dublin
"Plain outer packaging, signed delivery, batch number matched the COA. Exactly what a UK supply should look like."
J. Reed
Sports-medicine clinic · Leeds
"Comparison guides on the site convinced me. Ordered the 64mg pen for the full titration — no need to reorder mid-protocol."
S. Banerjee
PhD candidate · Edinburgh
"Honestly the best peptide supply experience I've had in the UK. Tracked Royal Mail Special, cold mailer, real support email."
T. Hargreaves
Researcher · Bristol
"Pen worked flawlessly out of the fridge. Dose dial is smooth, no resistance. Far better than reconstituting from raw vials."
Dr R. Chen
Clinical research · Birmingham
"Ordered Friday at 1:30pm — pen arrived Saturday before 11am. Cold-chain held perfectly across the weekend."
L. Andrews
Independent researcher · Glasgow
Real results
Outcomes shared by researchers and protocol participants using Body Pharm Retatrutide pens. Individual results vary — these stories are illustrative and not a guarantee of outcome.
2 months on Retatrutide
“The appetite noise just… stopped. I wasn't fighting cravings any more, I was actually full after a normal meal. Two months in and my clothes fit completely differently.”
7 months on Retatrutide
“I'd tried every diet. The triple agonist mechanism is genuinely different — energy went up, hunger went down. Seven months later I look like a different person.”
12 months on Retatrutide
“I'm 47 and in the best shape of my adult life. Slow titration, weekly pen, consistent training. The pen format made the protocol effortless.”
2.5 months on Retatrutide
“Down from 163 to 126 in ten weeks. The Body Pharm pen made dosing simple — I never missed a week. The visible recomp once I added lifting was the unlock.”
Photos shared with consent. Retatrutide is supplied for in-vitro research only and is not MHRA approved for human use.
Common Questions
Can't find what you need? Email hello@retatrutide-uk.co.uk.
Retatrutide is sold for in-vitro laboratory research only. It is not approved by the MHRA for human use. All sales are conducted under research-use-only terms.
Both pens contain the same Body Pharm formulation. The 64mg pen simply holds double the total active compound, extending the number of doses available per pen.
Retatrutide is a triple GLP-1 / GIP / glucagon agonist, while Tirzepatide is a dual GLP-1 / GIP agonist. Phase 2 Retatrutide data showed ≈24% weight loss vs ≈21% for Tirzepatide's SURMOUNT-1.Read nextRetatrutide vs Tirzepatide (Mounjaro) — full comparison →
Semaglutide is a single-receptor GLP-1 agonist; Retatrutide adds GIP and glucagon activity. Phase 2 Retatrutide reported ≈24% weight loss vs Semaglutide's ≈15% in STEP-1.Related guideRetatrutide vs Semaglutide (Ozempic / Wegovy) — full comparison →
Orders placed before 2pm Monday–Friday dispatch the same day via Royal Mail Special Delivery, typically arriving the next business day.
Yes. We source directly and each pen ships in sealed Body Pharm packaging with batch numbering. Independent HPLC certificates are available on request.
In an insulated 2–8°C mailer with a temperature indicator strip, packed in plain unbranded outer packaging.
Ready to order