Reta Pen 40 — crafted in London, shipped to you anywhere.
The UK's most-ordered reta pen, finished and quality-checked in our London research lab and delivered discreetly worldwide. From £189 / €221 / $240, with free tracked UK delivery and a 60-day satisfaction guarantee on every retatrutide pen.
Four Reta Pen 40 plans — GBP / EUR / USD
Every reta pen 40 plan includes a premium retatrutide pen, free UK delivery, discreet worldwide shipping with cold-chain protection, and our 60-day satisfaction guarantee. The longer the plan, the better the per-pen value.
- 1 × Reta Pen 40 (2-month supply)
- Free tracked UK delivery (2-3 days)
- Tracked worldwide shipping
- Discreet packaging, neutral sender
- 60-day satisfaction guarantee
- WhatsApp support 7/7
- 2 × Reta Pen 40 (4-month supply)
- Free tracked UK delivery
- Tracked worldwide shipping
- Discreet packaging, neutral sender
- 60-day satisfaction guarantee
- Priority WhatsApp support
- 3 × Reta Pen 40 (6-month supply)
- 1 reta pen included FREE
- Free express UK delivery
- Tracked worldwide shipping
- Discreet packaging, neutral sender
- 60-day satisfaction guarantee
- VIP WhatsApp support
- 6 × Reta Pen 40 (12-month supply)
- 2 reta pens included FREE
- Free express UK delivery
- Tracked worldwide shipping
- Discreet packaging, neutral sender
- 60-day satisfaction guarantee
- VIP WhatsApp + account manager
Inside the Reta Pen 40
An interactive tour of every component — from the tamper-sealed cap to the 31G stainless steel needle. Each part designed in the UK.
Real reta pen journeys, real progress
A small selection of progress photos shared with us by customers using the Reta Pen 40 as part of their daily wellness routine. Tap any image to view larger.
Individual results vary. The photos above are shared with explicit consent by customers and reflect their personal experience using the Reta Pen 40 alongside lifestyle and dietary choices. Reta Pen 40 is a premium wellness product, not a regulated medicine. We make no specific outcome promises.
What real reta pen 40 customers say
Honest reviews from verified customers across the UK, Europe and the US. We do not pay for reviews, we do not delete the critical ones, and every reta pen reviewer ordered through retapen40.co.uk.
"Ordered the Buy 2 Get 1 plan on a Sunday evening and the reta pen arrived Tuesday morning — fully tracked, in unmarked packaging. The Reta Pen 40 feels properly premium, not the dodgy stuff you find on import sites. UK support replied to my WhatsApp within ten minutes when I had a question."
"Shipped from London to Berlin in 4 working days, cold-chain box still cool on arrival, and the team confirmed the EUR amount on WhatsApp before charging. First retatrutide pen I've ordered from outside Germany that actually arrived professionally."
"Bought the 12-month Protocol after trying the Starter for two months. The per-pen pricing on the longer reta pen plans is genuinely good value, and the team threw in a small wellness journal with my order. Small touch, but it shows they care."
"Ordered from California — WhatsApp gave me the USD amount upfront, no FX games. Arrived in 7 working days via tracked international, plain box, no customs hassle. The Reta Pen 40 is genuinely well-engineered."
"Customer service is what made the difference. I had a question about storing the reta pen during a heatwave and got a thoughtful WhatsApp reply within 6 minutes from someone who actually knew what they were talking about. That's rare these days."
"Solid product, solid service. Delivery was a day later than expected (Easter weekend) but they were upfront about it when I asked. The Reta Pen 40 itself works exactly as described. Would order from Retapen40 again."
What is Reta Pen 40?
Reta Pen 40 is the UK's premium retatrutide pen — a thoughtful, discreet addition to your daily wellness routine. Each reta pen is finished in our British research lab, quality-checked, and shipped directly to your door in plain packaging — in the UK or worldwide.
Built on the principles of premium quality, discretion, and real support, the Reta Pen 40 retatrutide pen has become one of the most-ordered wellness pens — with over 2,800 customers across the UK, EU and US choosing this reta pen since 2025.
For the full technical breakdown, read our complete retatrutide pen UK guide. To explore other peptide pen options in our range, see our peptide pen collection. For the latest clinical evidence, see our breakdown of the Triumph-1 trial results or compare reta to other peptides in our retatrutide vs tirzepatide vs semaglutide guide.
Pre-loaded retatrutide pen
Each Reta Pen 40 comes pre-loaded with a 40mg cartridge in a sealed, sterile auto-injector format — designed for self-administered weekly dosing.
British craftsmanship
Every reta pen is finished and quality-checked in our London research lab. We don't outsource quality control — it's done in the UK, every batch.
UK & worldwide shipping
Free tracked Royal Mail delivery to UK addresses in 2-3 working days. Discreet worldwide shipping with cold-chain protection to most countries in 3-10 working days.
60-day satisfaction guarantee
If your Reta Pen 40 doesn't meet expectations within 60 days, our support team arranges a full refund — no awkward questions.
Built around what actually matters
No fluff, no medical jargon, no promises we can't keep. Just a thoughtful reta pen product, made in the UK, delivered discreetly anywhere.
Crafted in the UK
Every Reta Pen 40 is finished in our British research lab and quality-checked before it leaves us. You're buying from a real UK brand — not a faceless overseas warehouse.
Worldwide Delivery
UK orders ship free in 2-3 working days. International orders ship tracked with cold-chain packaging to most countries, typically 3-10 working days. Plain, unbranded parcels — always.
60-Day Guarantee
If you're not satisfied with your Reta Pen 40 retatrutide pen within 60 days of receiving your order, our team arranges a full refund. No quibbles.
From WhatsApp to your door in under 72 hours
No medical questionnaires, no awkward calls, no clinic visits. Just a simple, modern way to order your reta pen — direct via WhatsApp, built around your time.
Choose your reta pen plan
Pick Starter, Duo, Buy 2 Get 1 FREE, or 12-Month Protocol. Each shown in GBP, EUR and USD.
Order on WhatsApp
Click any Buy button — WhatsApp opens with your plan pre-filled. Send the message. We confirm shipping and price within minutes.
Pay securely
Card, bank transfer, PayPal or crypto. We send a secure payment link in your local currency. No checkout, no account.
Discreet delivery
UK: tracked Royal Mail in 2-3 days. International: tracked cold-chain shipping in 3-10 days. Plain packaging, neutral sender.
Dig deeper into retatrutide
Two essential reads for anyone considering the Reta Pen 40 — the latest clinical evidence, and how retatrutide compares to the other peptides you've heard about.
Retatrutide Triumph-1 Results — what the 2026 trial actually showed
A plain-English breakdown of the Triumph-1 Phase 3 trial results, the headline weight-loss figures, the safety profile, and what the data means for buyers considering a retatrutide pen in 2026.
Read the full breakdown → Peptide ComparisonRetatrutide vs Tirzepatide vs Semaglutide — the honest comparison
How retatrutide differs from tirzepatide (Mounjaro) and semaglutide (Wegovy, Ozempic) on mechanism, efficacy data, and real-world use. Built for readers trying to decide which peptide fits their goals.
Compare the three peptides →Reta pen questions answered
Honest answers to the questions customers ask before ordering the Reta Pen 40. Have a different question? Message us on WhatsApp.
Your Reta Pen 40 is only a WhatsApp away
Order today before 4pm UK time and your reta pen ships within 24 hours. Free tracked UK delivery, discreet worldwide shipping, and a 60-day satisfaction guarantee on every retatrutide pen order. Prices in GBP, EUR and USD.