Semaglutide Vials UK — 10mg, 20mg & 30mg Research Vials
Lyophilised semaglutide peptide vials, held in UK stock and dispatched the same working day when you order before 1pm. The 30mg vial is £94 and available now, with 10mg (£49.99) and 20mg (£72.99) vials also in stock — each independently HPLC tested and confirmed by mass spectrometry with a batch-matched Certificate of Analysis.
Prefer it ready to dose? The same vials can be prepared as a pre-filled Sema pen — just switch the Format selector on the product page. For In Vitro Use Only — Not for Human Use.
Semaglutide vial prices & cost per mg
| Vial | Price | Cost per mg | Status |
|---|---|---|---|
| Semaglutide 10mg | £49.99 | £5.00 | In UK stock |
| Semaglutide 20mg | £72.99 | £3.65 | In UK stock |
| Semaglutide 30mg | £94 | £3.67 | In UK stock |
All strengths sit on one page — buy semaglutide vials here.
Reconstitution — mg/mL and syringe units
The simplest approach is 1mL of bacteriostatic water per 10mg of peptide, which gives a clean 10mg/mL solution on every strength. Add it slowly down the inside wall, swirl gently and never shake.
| Vial | Bac water | Concentration | 0.5mg | 1mg | 2.4mg |
|---|---|---|---|---|---|
| 10mg | 1mL | 10mg/mL | 5 units | 10 units | 24 units |
| 20mg | 2mL | 10mg/mL | 5 units | 10 units | 24 units |
| 30mg | 3mL | 10mg/mL | 5 units | 10 units | 24 units |
Working with a different fill volume? Use the free reconstitution calculator.
How long a semaglutide vial lasts
| Weekly amount | 10mg vial | 20mg vial | 30mg vial |
|---|---|---|---|
| 0.25mg | 40 weeks | 80 weeks | 120 weeks |
| 0.5mg | 20 weeks | 40 weeks | 60 weeks |
| 1mg | 10 weeks | 20 weeks | 30 weeks |
| 1.7mg | ≈6 weeks | ≈11.5 weeks | ≈17.5 weeks |
| 2.4mg | ≈4 weeks | ≈8 weeks | 12.5 weeks |
Note: once reconstituted, solution is generally treated as usable for around the standard refrigerated window refrigerated, so larger vials are usually reconstituted in stages rather than all at once.
Cost comparison
How long does a Semaglutide vial last?
Weekly research allocations matched to the Ozempic / Wegovy dose range. See vial life and weekly cost for each strength.
| Weekly allocation | 10mg vial £49.99 | 20mg vial £72.99 | 30mg vial £94.00 | Best value |
|---|---|---|---|---|
| 0.25mg/week Ozempic/Wegovy-equivalent | 40 weeks £1.25/week | 80 weeks £0.91/week | 120 weeks £0.78/week | £0.78/week £94.00 30mg vial Save 98% vs Ozempic/Wegovy |
| 0.5mg/week Ozempic/Wegovy-equivalent | 20 weeks £2.50/week | 40 weeks £1.82/week | 60 weeks £1.57/week | £1.57/week £94.00 30mg vial Save 96% vs Ozempic/Wegovy |
| 1mg/week Ozempic/Wegovy-equivalent | 10 weeks £5.00/week | 20 weeks £3.65/week | 30 weeks £3.13/week | £3.13/week £94.00 30mg vial Save 92% vs Ozempic/Wegovy |
| 1.7mg/week Ozempic/Wegovy-equivalent | 5w 6d £8.50/week | 11w 5d £6.20/week | 17w 5d £5.33/week | £5.33/week £94.00 30mg vial Save 86% vs Ozempic/Wegovy |
| 2.4mg/week Ozempic/Wegovy-equivalent | 4w 1d £12.00/week | 8w 2d £8.76/week | 12w 4d £7.52/week | £7.52/week £94.00 30mg vial Save 81% vs Ozempic/Wegovy |
For in vitro research use only — not for human use. Ozempic and Wegovy are licensed prescription medicines; this table is a cost-per-milligram illustration for researchers, not medical advice or a recommendation to replace a prescription. The 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.
Vial vs pen — what actually changes
- Vial — lowest cost per mg, full flexibility, but you supply bacteriostatic water, syringes and sterile technique.
- Pen — we reconstitute and fill a dial-a-dose Quick Pen in our UK facility and send a clicks-per-mg card; one all-in price, nothing to mix.
- The compound, batch and COA are identical — only the delivery format differs.
Full pen detail is in the Semaglutide pen UK guide, and the compound background is in the Semaglutide UK guide.
Purity, COAs and UK dispatch
- Independently HPLC tested and confirmed by mass spectrometry, every batch.
- Batch Certificates of Analysis published openly.
- Held in UK stock — same-day dispatch before 1pm, Royal Mail Tracked 24.
- Discreet, plain outer packaging.
Other GLP research vials
We also stock Tirzepatide vials, Semaglutide vs Ozempic & Wegovy, Retatrutide vials and Cagrilintide vials. Browse the full range in our UK peptide vials hub. Compare them in our Tirzepatide vs Semaglutide and Retatrutide vs Semaglutide guides.
Browse related products
- Semaglutide — 10mg / 20mg / 30mg
- Tirzepatide Vials — 20mg / 40mg / 60mg
- Retatrutide — 10mg / 20mg / 30mg / 40mg
- Bacteriostatic Water 10mL
Frequently asked questions
Where can I buy semaglutide vials in the UK?
Peptides UK 4U holds lyophilised semaglutide peptide vials in UK stock. The 30mg vial is £94, the 20mg £72.99 and the 10mg £49.99 — all in UK stock now. Every batch is HPLC tested with a batch-matched Certificate of Analysis, and orders placed before 1pm on a working day are dispatched the same day. For In Vitro Use Only — Not for Human Use.
How much is a semaglutide vial in the UK?
Our semaglutide 30mg vial is £94, which works out at about £3.67 per mg. The 20mg vial is £72.99 (£3.65 per mg) and the 10mg vial is £49.99 (£5.00 per mg) — both in UK stock.
How much bacteriostatic water do I add to a semaglutide vial?
A simple approach is 1mL per 10mg of peptide, giving a clean 10mg/mL solution — 1mL for a 10mg vial, 2mL for 20mg and 3mL for 30mg. Add the water slowly down the inside wall of the vial and swirl gently — never shake.
How many units is 1mg of semaglutide from a vial?
At 10mg/mL (the 1mL-per-10mg fill above), 1mg is 10 units on a U-100 insulin syringe. 0.25mg is 2.5 units, 0.5mg is 5 units, 1.7mg is 17 units and 2.4mg is 24 units. Our free reconstitution calculator works this out for any fill volume.
How long does a semaglutide vial last?
It depends on the weekly amount used. A 30mg vial covers 30 weeks at 1mg per week, roughly 17 weeks at 1.7mg, or about 12 weeks at 2.4mg. Once reconstituted, semaglutide is generally treated as stable for around the standard refrigerated window refrigerated at 2–8°C.
Semaglutide vial or pen — which should I choose?
The peptide is identical. A vial is the cheapest per mg and gives full dosing flexibility, but needs bacteriostatic water, a syringe and sterile technique. A pre-filled Quick Pen arrives ready to dose with a calibrated clicks-per-mg card. Pick either on the product page using the Format selector.
Is semaglutide a peptide?
Yes. Semaglutide is a synthetic 31-amino-acid GLP-1 receptor analogue with a C18 fatty-diacid modification at Lys26. We supply it as a research-grade lyophilised peptide vial for in vitro laboratory research only.
Do semaglutide vials come with a Certificate of Analysis?
Yes. Every batch is independently HPLC tested and confirmed by mass spectrometry, and the batch-matched COA is published openly on our COA page so you can verify the exact vial you received.
How are semaglutide vials shipped in the UK?
Lyophilised vials are shipped in protective, discreet packaging via Royal Mail Tracked 24 from our UK premises, with same-day dispatch before 1pm. No customs, no overseas transit.
How should I store an unopened semaglutide vial?
Store lyophilised vials cool, dark and dry — below -18°C for long-term storage, or a 2–8°C fridge for shorter periods. Once reconstituted, keep refrigerated, out of light, never frozen and never shaken.
Is it legal to buy semaglutide vials in the UK?
Semaglutide may be purchased and possessed in the UK for laboratory research purposes only. It is not a licensed medicine and is not intended for human or animal use. For In Vitro Use Only — Not for Human Use.
Disclaimer: All products sold by Peptides UK 4U are for laboratory and research purposes only. They are not intended for human or animal consumption, diagnosis, treatment or prevention of any disease.