Research use only
Retatrutide, dispatched from the UK to anywhere in Europe
Burn fat. Keep performance.
Retatrutide and Tirzepatide pens, one clear price each. Every kit ships with the pen, cartridges and instructions shown below.
Retatrutide 20mg pen
Complete kit — pen, cartridges, instruction guide
£220
+ postage — next day UK when payment confirmed by midnight, signed & tracked Europe. Free postage on 2 or more pens.
- Ships from
- United Kingdom
- Delivers to
- All of Europe
- Payment
- Bank transfer, PayPal
20mg pen · triple-pathway compound
Everything worth knowing about the 20mg Retatrutide pen
Retatrutide sits in a newer class of investigational metabolic peptides. Rather than acting on a single hormone route, it engages three at once — which is exactly why it reads differently to the single- and dual-receptor compounds that came before it.
Our 20mg pen format holds the full research quantity in one device, so dosing increments come from the pen dial rather than from repeated reconstitution.
- Pen at a glance
- Strength20mg per pen
- FormatPre-filled dial pen + cartridges
- ClassGLP-1 / GIP / glucagon triple agonist
- AppearanceWhite powder, clear on reconstitution
- Batch purity98.6% (HPLC)
→ GLP-1 route
Appetite signalling and insulin response.
→ GIP route
Nutrient handling and metabolic regulation.
→ Glucagon route
Energy output and use of stored energy.
How the three pathways stack up
→ Appetite is dialled down
- » Fullness signals reach the brain sooner
- » Food intake typically drops without conscious effort
→ Metabolism runs more efficiently
- » Insulin-related processes are supported
- » Nutrients are put to use rather than stored
→ Energy output lifts
- » Associated with higher energy expenditure
- » Shifts how stored energy is drawn on
What research has looked at
- → Body-weight reduction over extended periods
- → Appetite and food-intake control
- → Glucose handling
- → Energy expenditure and metabolic function
- → Health complications linked to excess weight
Phase 3 work has reported reductions of roughly 28% in body weight at 80 weeks on a 12mg dose in one obesity trial. Substantial weight loss draws on fat and lean tissue alike, so protein intake and resistance training matter throughout. Nothing about the compound guarantees muscle is preserved.
Using the pen — step by step
- → Bring the pen to room temperature and check the cartridge is clear
- → Fit a fresh needle and prime until a bead appears
- → Dial the required amount on the pen collar
- → Choose a site and rotate it each time
- → Hold for a slow count after the dose completes
- → Cap, dispose of the needle, and return the pen to cold storage
Storage
- → Refrigerate at 2–8°C, unopened
- → Keep away from light and freezing
- → Do not shake the cartridge
Handling notes
- → One needle per use, never reused
- → Record batch and date for your own log
- → Supplied for laboratory research only
Take the full guide with you
Everything on this page — pen specs, the three pathways, research notes, dosing steps and storage — as a printable PDF you can open and save.
→ Download 20mg pen guide (PDF)The kit in detail
Lab test results
The raw material used in our pens is tested by an independent analytical laboratory. Each certificate below is for a 10mg sample of that same active material — not a 10mg pen.
Retatrutide raw material
- Chromatographic purity
- 98.6%
- Tested sample content
- 10.03 mg
- Batch ID
- GD-20260729-RT10
Tirzepatide raw material
- Chromatographic purity
- 98.8%
- Tested sample content
- 10.26 mg
- Batch ID
- GD-20260729-TR10
Also in stock · dual-pathway compound
Tirzepatide — the dual-receptor option
Tirzepatide is a twin-acting agonist: it works on the GLP-1 and GIP receptors at the same time. In research settings that pairing has been linked to lower appetite drive, steadier blood glucose handling and a more efficient use of stored fat for fuel — with lean mass better preserved than on single-pathway compounds.
Tirzepatide pen
Complete kit — pen, cartridge, needles, instruction guide
£185
+ postage — next day UK when payment confirmed by midnight, signed & tracked Europe. Free postage on 2 or more pens.
- Ships from
- United Kingdom
- Delivers to
- All of Europe
- Payment
- Bank transfer, PayPal
How the two pathways work
- → GLP-1 receptor — slows how quickly the stomach empties and dampens hunger signalling, so portions feel smaller and cravings arrive less often.
- → GIP receptor — improves how insulin is released after food and how fat cells handle incoming energy, pushing calories toward being used rather than stored.
- → Together — a lower calorie intake alongside better glucose control, which is why research reports fat loss with performance and lean tissue largely intact.
Reported in research
- → Marked reductions in body weight and waist measurement
- → Reduced appetite and fewer episodes of over-eating
- → Improved insulin sensitivity and fasting glucose
- → Better lipid markers and lower blood pressure
- → Steady daily energy without stimulant-style spikes
Handling & storage
- → Store refrigerated at 2–8°C, away from light
- → Bring to room temperature before use, never heat it
- → Do not shake — invert gently if mixing is needed
- → Fresh needle each time; dispose in a sharps bin
- → Once in use, keep the pen capped between sessions
Supplied strictly for laboratory research purposes. Not for human or veterinary consumption.
Multi-pen offer
Order 2 or more pens — postage is on us
Mix and match Retatrutide and Tirzepatide however you like. Once your order reaches two pens, postage is free — next day in the UK, signed & tracked across Europe, on the same midnight cut-off.
1 pen
Standard postage added
Postage quoted for your country when you order.
2 pens
Free postage
Any combination of Retatrutide and Tirzepatide.
3+ pens
Free postage + priority packing
Message us for a bulk total before you pay.
- → Applies to any mix of pens, not just the same product
- → All pens in one order ship together in a single discreet parcel
- → Free postage is applied to the total we quote before you pay
- → Paid and confirmed by midnight? Dispatched the next working day
Order flow
How ordering works
Three clear stages — message, pay, receive — with updates at every step.
Send your order request
Message us on WhatsApp with your country and how many pens you need. We reply the same day with the total including postage.
- → WhatsApp: 07516 787240 (replies within a few hours, 7 days a week)
Choose how to pay
Once you confirm, we send secure payment details for either option.
- → Bank transfer — GBP or EUR account details sent on WhatsApp
- → PayPal — invoice link sent on WhatsApp for card or balance payment
Payment confirmation
Send us a screenshot or payment reference on WhatsApp once paid. We confirm receipt and start packing within 24 hours.
Dispatch from the UK
Orders paid and confirmed by midnight are dispatched the next working day guaranteed. We send you the tracking number on WhatsApp as soon as the parcel leaves.
- → UK orders: next working day delivery after dispatch
- → Europe orders: signed-for and tracked every step of the way
Delivery updates
Track your parcel in real time. If customs or delivery needs anything extra, we handle it on WhatsApp until it reaches you.
Answers & schedules
The details, on their own pages
Storage, delivery, payment and week-by-week titration tables live on dedicated pages so you can find them fast.
→ FAQ
Storage, preparation, delivery times, free multi-pen postage, payment and lab testing.
Read the FAQ
→ Dosing schedules
Week-by-week titration tables for both pens, plus milligram-to-unit conversions.
View schedules
→ Contact
Message us on WhatsApp for a total including postage. Replies within hours, 7 days a week.
Contact us
Catalogue
More peptides coming soon
We are expanding the range. If there is a specific compound you would like us to stock, message us on WhatsApp and we will let you know as soon as it lands.