Semaglutide UK — GLP-1 Research Peptide
Semaglutide is the original modern GLP-1 receptor agonist — the reference compound that opened the door to today's metabolic research peptide market. Peptides UK 4U supplies Semaglutide as 30mg vials and pre-filled Quick Pens, dispatched same-day from the UK with independent HPLC certificates on every batch.
Why researchers still choose Semaglutide
Newer dual and triple agonists exist, but Semaglutide remains the most-studied compound in the space and the reference standard against which every newer GLP-1 analogue is compared. For any study that needs a well-characterised baseline GLP-1 agonist, it is still the compound of choice.
Vial sizes, pens & purity
- Semaglutide 30mg vial — flexible dosing for extended research programs. Full pricing, cost per mg and reconstitution tables are on the Semaglutide vials UK page.
- Semaglutide Quick Pen — pre-filled, ready-to-dose, same lab-tested batch.
- Every batch independently HPLC tested at ≥99% purity, with COA published on our COA page.
- Not sure how this differs from the licensed brands? Read Semaglutide vs Ozempic & Wegovy.
Semaglutide vial life vs Ozempic/Wegovy-equivalent dosing
Researchers often compare Semaglutide allocations to the Ozempic / Wegovy dose range. The table below shows how long each of our vials lasts at common weekly research allocations, and the equivalent weekly cost.
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.
Reconstitution — quick reference
Draw bacteriostatic water and add it slowly down the inside wall of the vial. Never shake. Swirl gently until fully dissolved and refrigerate. For exact volumes, use our peptide reconstitution calculator.
UK dispatch & discreet delivery
Every Semaglutide order ships from our UK facility with Royal Mail 24-hour tracked delivery. Vials are packed with ice packs and insulation, in plain unbranded packaging. Card payments are processed through a secure, encrypted gateway with 3-D Secure.
Browse related products
- Semaglutide 30mg vial
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Frequently asked questions
What is Semaglutide?
Semaglutide is a synthetic GLP-1 receptor agonist peptide, the original single-agonist compound behind the modern metabolic research peptide space. It remains the most-studied GLP-1 analogue available.
Where can I buy Semaglutide in the UK?
Peptides UK 4U stocks Semaglutide 30mg vials and pre-filled Quick Pens, dispatched next-day from the UK with full tracking. Every vial is independently HPLC tested.
Is Semaglutide legal in the UK?
Semaglutide is legal to purchase and possess for laboratory research purposes in the UK. It is not a licensed medicine and is strictly for in-vitro research use only.
Semaglutide vs Tirzepatide vs Retatrutide?
Semaglutide targets GLP-1 alone, Tirzepatide targets GLP-1 and GIP, and Retatrutide targets GLP-1, GIP and glucagon. See our comparison pages for the full breakdown.
How do I reconstitute Semaglutide?
Add bacteriostatic water slowly down the side of the vial. Never shake. Once dissolved, store at 2–8°C and use within 28 days. Our peptide calculator gives exact reconstitution volumes.
Semaglutide vial or Quick Pen — which is better?
Vials give you the widest dosing flexibility for research; Quick Pens arrive pre-filled and ready to dose. Both come from the same lab-tested batches.
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.