📞 ORDER BY PHONE:
Tesamorelin Pen vs Vial UK: Which Is Better for Research?
Updated October 2026 · MyPep Biotech UK · For laboratory research use only. Not for human consumption.
Quick answer
A Tesamorelin pen comes pre-filled in a 3ml cartridge, so there is no mixing and every click measures exactly 0.01ml. A Tesamorelin vial is freeze-dried powder that the researcher reconstitutes with bacteriostatic water. Pens are the easiest to measure and come in four strengths from £69.99. The 40mg vial (£98.99) is the lowest cost per mg. Both are on pre-order now, with new stock expected within 7 to 10 days.
🖊️ Shop Tesamorelin Pens🧪 Shop Tesamorelin Vials
Tesamorelin pen vs vial at a glance
| Feature | Tesamorelin Pen | Tesamorelin Vial |
|---|---|---|
| Format | Pre-filled 3ml cartridge | Lyophilised powder |
| Mixing needed? | No | Yes, with bacteriostatic water |
| How it is measured | Dial clicks (1 click = 0.01ml) | Syringe units |
| Strengths at MyPep | 10mg, 20mg, 30mg, 40mg | 40mg |
| Price at MyPep | £69.99 to £129.99 | £98.99 |
| Stock | 📦 Pre-order (7–10 days) | 📦 Pre-order (7–10 days) |
| Best for | Easy, consistent measuring | Lowest cost per mg |
Free Peptide Calculator UK
Working out reconstitution? Use our peptide calculator to find the bacteriostatic water volume, concentration per ml and pen clicks for any vial or pen strength.
Tesamorelin pen vs vial price UK (cost per mg)
| Product | Price | Cost per mg |
|---|---|---|
| Tesamorelin Pen 40mg | £119.99 | £3.00 (best value pen) |
| Tesamorelin Pen 30mg | £129.99 | £4.33 |
| Tesamorelin Pen 20mg | £109.99 | £5.50 |
| Tesamorelin Pen 10mg | £69.99 | £7.00 |
| Tesamorelin Vial 40mg | £98.99 | £2.47 ⭐ lowest per mg |
A vial also needs bacteriostatic water and syringes, so the full cost of a vial set-up is a little higher than the vial price alone. The 40mg Tesamorelin pen is cheaper than the 30mg pen, making it the best value pen.
How a Tesamorelin pen works
Each MyPep pen holds a 3ml cartridge with 300 clicks. One click is 0.01ml, and the dial turns up to 60 clicks at a time. The mg in each click depends on the pen strength:
- 40mg pen: about 0.133mg per click
- 30mg pen: 0.1mg per click
- 20mg pen: about 0.067mg per click
- 10mg pen: about 0.033mg per click
Use our free Pen Click Calculator to turn any mg amount into clicks for each pen.
How a Tesamorelin vial works
A vial holds freeze-dried Tesamorelin powder. In the lab it is reconstituted with bacteriostatic water, and the amount drawn up is measured in syringe units. The strength per unit depends on how much water is added. Our Peptide Calculator works out the units for any vial and water amount.
Pros and cons
Tesamorelin pen ✅ no mixing, no syringe maths, every click the same, compact and easy to store.
Tesamorelin pen ⚠️ costs more per mg than the vial.
Tesamorelin vial ✅ lowest cost per mg at MyPep (about £2.47 per mg), flexible concentration.
Tesamorelin vial ⚠️ needs reconstitution, bacteriostatic water and syringes, and more room for measuring errors.
Which should you choose?
If you want the simplest set-up and the most consistent measuring, choose the Tesamorelin pen. The 40mg pen is the most popular and best value pen at £3.00 per mg, and the 10mg pen is the lowest-cost way to start at £69.99. If your lab already reconstitutes peptides, the Tesamorelin 40mg vial is the lowest cost per mg. Also compare our Retatrutide pens and Tirzepatide pens.
UK delivery
All MyPep pens and vials are posted from the UK in plain, discreet, well-padded packaging with tracking. Paid orders are usually posted the same working day.
Frequently Asked Questions
Is a Tesamorelin pen better than a vial?
For ease of use, yes. A Tesamorelin pen is pre-filled, needs no mixing and measures 0.01ml per click. A vial suits labs that already reconstitute peptides and want the lowest cost per mg.
Is a Tesamorelin pen cheaper than a vial?
No. Per mg, the 40mg Tesamorelin vial is cheapest at about £2.47 per mg. The best value pen is the 40mg Tesamorelin pen at about £3.00 per mg.
What strengths do Tesamorelin pens come in?
MyPep Tesamorelin pens come in 10mg (£69.99), 20mg (£109.99), 30mg (£129.99) and 40mg (£119.99). The Tesamorelin vial comes in 40mg (£98.99).
Do you need to mix a Tesamorelin pen?
No. MyPep Tesamorelin pens come pre-filled in a 3ml cartridge, so no reconstitution or bacteriostatic water is needed.
How many mg is one click on a 40mg Tesamorelin pen?
About 0.133mg per click, because 40mg is spread across 300 clicks of 0.01ml. A 10mg pen is about 0.033mg per click.
Is Tesamorelin in stock?
Tesamorelin pens and vials are on pre-order now. You can order and pay today, and new stock is expected within 7 to 10 days.
Where can I buy a Tesamorelin pen in the UK?
You can buy Tesamorelin pens and vials from MyPep Biotech UK at mypepbiotech.co.uk/tesamorelin-40mg-pen-2, posted from the UK with tracked delivery. For laboratory research use only.
All MyPep products are sold for laboratory research use only. Not for human consumption. This page does not give medical advice.
