Tirzepatide prices in the UK
| Vial | Price | Cost per mg | Best for |
|---|---|---|---|
| Tirzepatide 20mg | £90.00 | £4.50 | First order, shorter protocols |
| Tirzepatide 40mg | £140.00 | £3.50 | Best £/mg, longest vial life |
| Tirzepatide 60mg | £170.00 | £2.83 | Best £/mg — in stock now |
We do not stock a 10mg Tirzepatide vial — 20mg is our smallest. The peptide is identical across strengths; only the quantity of lyophilised powder differs.
How long does a Tirzepatide vial last?
Weekly research allocations matched to the Mounjaro maintenance dose range. See vial life and weekly cost for each strength.
| Weekly allocation | 20mg vial £90.00 | 40mg vial £140.00 | 60mg vial £170.00 | Best value |
|---|---|---|---|---|
| 2.5mg/week Mounjaro-equivalent | 8 weeks £11.25/week | 16 weeks £8.75/week | 24 weeks £7.08/week | £7.08/week £170.00 60mg vial Save 83% vs Mounjaro |
| 5mg/week Mounjaro-equivalent | 4 weeks £22.50/week | 8 weeks £17.50/week | 12 weeks £14.17/week | £14.17/week £170.00 60mg vial Save 66% vs Mounjaro |
| 7.5mg/week Mounjaro-equivalent | 2w 5d £33.75/week | 5w 2d £26.25/week | 8 weeks £21.25/week | £21.25/week £170.00 60mg vial Save 49% vs Mounjaro |
| 10mg/week Mounjaro-equivalent | 2 weeks £45.00/week | 4 weeks £35.00/week | 6 weeks £28.33/week | £28.33/week £170.00 60mg vial Save 32% vs Mounjaro |
| 12.5mg/week Mounjaro-equivalent | 1w 4d £56.25/week | 3w 1d £43.75/week | 4w 6d £35.42/week | £35.42/week £170.00 60mg vial Save 15% vs Mounjaro |
| 15mg/week Mounjaro-equivalent | 1w 2d £67.50/week | 2w 5d £52.50/week | 4 weeks £42.50/week | £42.50/week £170.00 60mg vial Save -3% vs Mounjaro |
For in vitro research use only — not for human use. Mounjaro is a licensed prescription medicine; this table is a cost-per-milligram illustration for researchers, not medical advice or a recommendation to replace a prescription. The Mounjaro comparator price is editable so you can match the figure you see quoted by UK private clinics.
Calculations assume the entire vial is allocated at the stated weekly dose. Actual vial life depends on the exact protocol.
Which strength should you order?
- 20mg — our most-ordered Tirzepatide vial and the smallest we supply. Sensible for a first order or where a larger vial would sit reconstituted too long.
- 40mg — £3.50/mg against £4.50/mg for the 20mg, so roughly 22% better value per milligram where the research window justifies it.
Once reconstituted, store at 2–8°C protected from light. A larger vial only saves money if the material is used within its stability window.
Reconstituting Tirzepatide
- Wipe the stopper with an alcohol swab and allow it to dry.
- Add bacteriostatic water slowly down the inside wall — maximum 3ml per vial.
- Swirl gently until the solution is completely clear — never shake.
- Label the vial with the concentration and reconstitution date.
- Store at 2–8°C, protected from light, and avoid repeated freeze-thaw cycles.
For the exact volume and unit measurements for a 20mg or 40mg vial, use the free peptide reconstitution calculator.
Purity, testing & UK delivery
- Independently HPLC and mass-spec tested at 99%+ purity.
- Batch Certificates of Analysis published openly.
- UK-held stock — same working day dispatch before 2pm, Mon–Fri.
- Cold-shipped in insulated packaging via tracked Royal Mail 24.
- Plain, discreet outer packaging with no product names on the label.
Read more before you order
- Tirzepatide UK guide — the dual GLP-1/GIP mechanism and mg-to-units conversions.
- Tirzepatide pen UK — pre-filled Quick Pens with a clicks-per-mg chart.
- Tirzepatide vials UK — 20mg, 40mg and 60mg vial prices, cost per mg and how long each vial lasts.
- Tirzepatide vs Semaglutide and Retatrutide vs Tirzepatide.
- What is Tirzepatide? — plain-English guide to the peptide, half-life and strengths.
- Tirzepatide vs Mounjaro — how the research peptide differs from the licensed medicine.
- Tirzepatide research guide 2026.
Tirzepatide UK — frequently asked questions
Where can I buy Tirzepatide in the UK?
Peptides UK 4U holds Tirzepatide in UK stock in 20mg and 40mg lyophilised vials. Orders placed before 2pm Monday to Friday are dispatched the same working day by tracked Royal Mail 24, in plain unbranded packaging.
What Tirzepatide strengths do you sell?
We stock Tirzepatide 20mg at £90.00, Tirzepatide 40mg at £140.00 and Tirzepatide 60mg at £170.00. All three vial sizes are held in UK stock and dispatch same working day on orders placed before 2pm. We do not supply a 10mg vial — 20mg is our smallest Tirzepatide vial.
How much does Tirzepatide cost in the UK?
Tirzepatide 20mg is £90.00 (£4.50/mg), Tirzepatide 40mg is £140.00 (£3.50/mg) and Tirzepatide 60mg is £170.00 (£2.83/mg). The 60mg vial is the best value per milligram and is in stock now.
Which Tirzepatide strength should I choose?
The peptide is identical in both — only the amount of lyophilised powder differs. 20mg suits a first order or a shorter research window, while 40mg gives a noticeably lower cost per mg where a longer protocol is planned.
What purity is your Tirzepatide?
Every Tirzepatide batch is independently tested by RP-HPLC at 99%+ purity with mass-spec confirmation. The batch number on the vial matches a Certificate of Analysis published on our COA page.
How much bacteriostatic water do I add to Tirzepatide?
We cap Tirzepatide reconstitution at a maximum of 3ml of bacteriostatic water per vial. Add it slowly down the inside wall and swirl gently until clear — never shake. Use the free peptide calculator for the exact volume for your vial size.
Can I get Tirzepatide as a pre-filled pen?
Yes. We reconstitute the vial under sterile conditions in our UK facility and cold-ship it ready-to-use as a pre-filled Quick Pen. The Tirzepatide pen page has the full clicks-per-mg chart.
Is Tirzepatide legal to buy in the UK?
Tirzepatide is legal to buy and possess in the UK for laboratory research purposes. It is not a licensed medicine in the UK and is supplied strictly for in vitro research use only — not for human or animal consumption.
How is Tirzepatide shipped in the UK?
Cold-shipped in insulated packaging via tracked Royal Mail 24, in discreet plain outer packaging. Order before 2pm Monday to Friday for same working-day dispatch.