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GLP-1 Pens UK
Reta pens, Tirz pens and Sema pens — Retatrutide, Tirzepatide and Semaglutide pre-filled Quick Pens, reconstituted in our UK facility and cold-shipped ready to dial. Priced in GBP with no import charges, and every batch is HPLC tested at 99%+ purity.
Held in UK stock
Pens are prepared from stock we hold here — no waiting on overseas shipments or restock queues.
Same-day dispatch
Order before 1pm Mon–Fri and it leaves the same day on tracked Royal Mail 24.
Priced in GBP
No dollar conversion, no import duty, no customs hold-ups at the border.
Cold-shipped
Insulated cold packaging protects the peptide door-to-door.
Choose your GLP-1 pen
Retatrutide pen (Reta pen)
20mg · 30mg · 40mg
from £89 + £34.99 pen
Tirzepatide pen (Tirz pen)
20mg · 40mg · 60mg
from £90 + £34.99 pen
Semaglutide pen (Sema pen)
30mg
£94 + £34.99 pen
GLP-1 pen prices — us vs typical pen retailers
Prices shown are the total you pay on your first order — peptide plus reusable Quick Pen. Because the pen is a one-off purchase, your next orders only need a refill cartridge at £12.99. Pen-only retailers often bundle the device into the price and quote in US dollars, which can add conversion fees and import charges on top.
| Pen | Strength | Peptides UK 4U | Typical pen retailer |
|---|---|---|---|
| Retatrutide pen | 20mg | £123.99 | £140 – £180 |
| Retatrutide pen | 30mg | £153.99 | £180 – £245 |
| Retatrutide pen | 40mg | £188.99 | £220 – £310 |
| Tirzepatide pen | 20mg | £124.99 | £135 – £175 |
| Tirzepatide pen | 40mg | £174.99 | £200 – £260 |
| Semaglutide pen | 30mg | £144.98 | £160 – £220 |
Typical retailer figures are indicative ranges collected from publicly listed UK and US pen prices and will change over time. The Peptides UK 4U price is the all-in first-order total; refills use the same Quick Pen with a £12.99 cartridge.
Pen or vial — which should you choose?
Quick Pen
- Arrives reconstituted — nothing to mix
- Click-based dialling with a printed chart
- Reusable device; refills are £12.99
- Best if you want repeatable, low-fuss measuring
Vial + syringe
- Lowest cost per mg
- You choose the bacteriostatic water volume
- Full flexibility on concentration
- Use our calculator and the reconstitution guide
GLP-1 pen FAQs
What is a GLP-1 pen?
A GLP-1 pen is a dial-a-dose injection pen pre-loaded with a reconstituted GLP-1 class research peptide such as Retatrutide, Tirzepatide or Semaglutide. It replaces mixing a vial by hand and lets you dial an exact click-based volume.
Which GLP-1 pens can I buy in the UK?
Peptides UK 4U supplies Retatrutide (20mg, 30mg, 40mg), Tirzepatide (20mg, 40mg, 60mg) and Semaglutide (30mg) as pre-filled Quick Pens, prepared in-house under sterile conditions and dispatched from the UK.
Are GLP-1 pens cheaper than vials?
The peptide costs the same — the pen is a one-off £34.99 device. After your first order you can simply add a £12.99 pre-filled refill cartridge, which makes repeat orders cheaper than most pen-only retailers who bundle a new device every time.
Do I pay import duty?
No. Everything is held and dispatched from UK stock and priced in GBP, so there is no currency conversion, no customs clearance and no import charges.
How quickly do GLP-1 pens ship?
Order before 1pm Monday to Friday and your pen is prepared and dispatched the same day, cold-shipped on tracked Royal Mail 24.
How accurate is the dosing?
Quick Pens dial in fixed click increments. Each pen ships with a click chart matched to the exact strength and bacteriostatic water volume we used, and you can cross-check any figure in our free peptide calculator.
What are the branded GLP-1 pens called?
Mounjaro (tirzepatide, Eli Lilly) is supplied as a KwikPen or vials. Ozempic (semaglutide, Novo Nordisk) uses a multi-dose pre-filled FlexTouch pen and Wegovy (semaglutide) a single-dose pre-filled FlexTouch pen. Saxenda and Victoza use FlexTouch and FlexPen devices, and Trulicity (dulaglutide) uses its own single-dose pen. All of those names are registered trade marks of their owners; Peptides UK 4U is not affiliated with, endorsed by or connected to Eli Lilly or Novo Nordisk and does not supply licensed medicines.
Is a Quick Pen the same as a KwikPen or a FlexTouch pen?
No. KwikPen and FlexTouch pens are licensed prescription medicines for human use. Our Quick Pen is a reusable research device that we fill with research-grade peptide in our UK facility, supplied strictly for in vitro laboratory research. We make no claim of equivalence between the two.
For in vitro use only — not for human use. These products are supplied for laboratory research purposes only.