Rated Excellent 4.7 (137)
Klikjaro® - Tirzepatide 20mg Research Pen
Klikjaro® is a pre-filled tirzepatide research pen developed for controlled laboratory and analytical research. Designed in a convenient Klik-pen format, it provides a cleaner and more straightforward alternative to traditional research vials.
Dual-pathway GLP-1/GIP research compound
Pre-filled Klik-pen format
Designed for controlled research environments
£0.00
*This product is for research purposes only*
Before & After
Customer Reviews
Slide through to see some of our customers journeys...
James T. ★★★★★,
Verified Buyer
"Lost 11kg in 6 weeks. Genuinely couldn't believe how quickly it worked. Wish I'd found this sooner instead of wasting money on Ozempic for months."
Retatrutide 20mg
£129.00
Purchased on March 14th, 2026
Aisha K. ★★★★★,
Verified Buyer
"I tried Wegovy through my GP and barely lost anything. Switched to this and I'm down 14kg in 8 weeks. Night and day difference."
Retatrutide 20mg
£129.00
Purchased on February 4th, 2026
Dan R. ★★★★★,
Verified Buyer
"Appetite just disappeared from week one. No cravings, no effort. Went from 96kg to 82kg on one pen."
Retatrutide 20mg
£129.00
Purchased on March 3rd, 2026
Lauren B. ★★★★☆,
Verified Buyer
"Bit of nausea the first week but it passed quickly. Already lost 8kg in 5 weeks — well worth it."
Retatrutide 20mg
£129.00
Purchased on March 10th, 2026
Sophie M. ★★★★★,
Verified Buyer
"The pen is so easy to use — I was nervous about injecting but it's completely painless. Down two dress sizes already."
Retatrutide 20mg
£129.00
Purchased on February 18th, 2026
Mohammed H. ★★★★★,
Verified Buyer
"Was sceptical about buying online but delivery was quick and the results speak for themselves. Down 9kg and counting."
Retatrutide 20mg
£129.00
Purchased on January 25th, 2026
Chris W. ★★★★★,
Verified Buyer
"Saved me a fortune compared to what I was paying for Mounjaro privately. Better results too."
Retatrutide 20mg
£129.00
Purchased on January 10th, 2026
Fatima A. ★★★★★,
Verified Buyer
"Finally something that actually works. I've tried every diet going and nothing stuck. This just makes it effortless."
Retatrutide 20mg
£129.00
Purchased on December 13th, 2025
Tom P. ★★★★★,
Verified Buyer
"One pen and I'm done. Hit my target weight in under two months. Unreal."
Retatrutide 20mg
£129.00
Purchased on June 21st, 2025
Priya S. ★★★★☆,
Verified Buyer
"Took a couple of weeks to really kick in but once it did the weight dropped off fast. Would recommend starting on the lower dose."
Retatrutide 20mg
£129.00
Purchased on September 8th 2025
Ryan D. ★★★★★,
Verified Buyer
"Mate put me onto this after he dropped 10kg. I'm 7 weeks in and down 12kg myself. Pen couldn't be simpler to use."
Retatrutide 20mg
£129.00
Purchased on August 9th, 2025
Zainab N. ★★★★★,
Verified Buyer
"Was spending £200 a month on Wegovy and getting nowhere near these results. One pen, 9kg gone. Absolutely no brainer."
Retatrutide 20mg
£129.00
Purchased on January 18th, 2025
How To Use Your Tirzepatide
Follow these simple steps to get started
Prepare Your Pen
Remove the cap and inspect the solution — it should be clear and colourless. Attach a new needle tip and dial your prescribed dose.
Choose Your Injection
Pick a spot on your stomach, thigh, or upper arm. Rotate between areas each week to avoid irritation.
Start Your Titration
Begin at 2.5mg per week for the first few weeks, gradually increasing to 5mg as your body adjusts. Most users reach their goal without going higher.
Inject Your Dose
Pinch the skin, insert the needle at a 90° angle, and press the button. Hold for 10 seconds to ensure the full dose is delivered.
Track Your Progress
Monitor your weight weekly and note how your body responds. Results typically begin within the first 2-3 weeks.
Prepare Your Pen
Remove the cap and inspect the solution — it should be clear and colourless. Attach a new needle tip and dial your prescribed dose.
Choose Your Injection
Pick a spot on your stomach, thigh, or upper arm. Rotate between areas each week to avoid irritation.
Start Your Titration
Begin at 2.5mg per week for the first few weeks, gradually increasing to 5mg as your body adjusts. Most users reach their goal without going higher.
Inject Your Dose
Pinch the skin, insert the needle at a 90° angle, and press the button. Hold for 10 seconds to ensure the full dose is delivered.
Track Your Progress
Monitor your weight weekly and note how your body responds. Results typically begin within the first 2-3 weeks.
Klikjaro® vs Standard GLP-1 Research Vials
Here's why we're the industry leader
Klikjaro® vs Standard GLP-1 Research Vials
Here's why we're the industry leader
|
Klikjaro®
Improved
|
Standard Research Vials
Old
|
|
|---|---|---|
|
Product format
|
Pre-filled Klik-pen | Separate vial format |
|
Compound type
|
Tirzepatide | Varies by supplier |
|
Research pathway
|
GLP-1 + GIP | Often single-compound only |
|
Preparation
|
No manual reconstitution required | Manual reconstitution often required |
|
Handling
|
Cleaner, more convenient format | More preparation steps |
|
Storage
|
Refrigerated 2–8°C | Varies by supplier and formulation |
Our Impact Statistics
Our Impact Statistics
4.8 ★
Average customer rating
10,000+
Pens sold across the UK
£2,500+
Average savings vs prescription alternatives
Frequently Asked Questions
Find answers to common questions about our products, shipping, returns, and more.
What is Klikjaro®?
+
Klikjaro® is a pre-filled tirzepatide research pen designed for controlled laboratory and analytical research only.
What compound does Klikjaro® contain?
+
Klikjaro® contains tirzepatide, a compound commonly studied in relation to GLP-1 and GIP receptor pathways.
What is tirzepatide researched for?
+
Tirzepatide is commonly researched in relation to appetite signalling, glucose regulation, insulin response, energy balance and metabolic pathway models.
Is this product for human use?
+
No. Klikjaro® is strictly for research purposes only. It is not intended for human consumption, injection, veterinary use, diagnostic use, therapeutic use or cosmetic use.
Is the pen pre-filled?
+
Yes. Klikjaro® is supplied in a pre-filled Klik-pen format, designed to reduce the need for manual reconstitution in research settings.
How should I store it?
+
Store refrigerated between 2–8°C. Do not freeze. Keep away from direct sunlight and excessive heat.
Is Klikjaro® the same as prescription tirzepatide medication?
+
No. Klikjaro® is supplied as a research-use product only and should not be described, marketed or used as a prescription medicine.
What makes Klikjaro® different from standard vials?
+
Klikjaro® is supplied in a pre-filled Klik-pen format, offering a cleaner and more convenient handling option compared with traditional vial-based research compounds.