UK guide
Tirzepatide in the UK: Legal Status, Prices and Supplier Checks
Last reviewed
Tirzepatide is two different things in the UK: a licensed prescription medicine sold as Mounjaro, and a research compound supplied to laboratories. This guide sets out which is which, what research-grade tirzepatide costs, and how to check any supplier before ordering. To order research material, go to the tirzepatide product page.
The short version
- Two different products. Mounjaro is licensed tirzepatide, available only on prescription. Research-grade tirzepatide is laboratory material and is not a medicine.
- Price. Eleven strengths, 5 mg to 120 mg, in boxes of 10 vials from £3.42 ($4.50) per vial, every strength priced on the product page. Each box carries a batch-specific COA from Janoshik or Freedom Diagnostic.
- Not for human use. If you are looking for weight-loss treatment, the lawful route is a prescription through a GP or a registered pharmacy, not a research supplier.
From £3.42 / vial ($4.50)
Laboratory research use only. Free delivery worldwide over $750.
Guide
What a UK buyer should know
Points you can check independently. Nothing here is a claim about what tirzepatide does, or a statement that it is safe or effective for any purpose.
A licensed medicine and a research compound
Tirzepatide is a dual GIP and GLP-1 receptor agonist. Its obesity trial, SURMOUNT-1, is published in the New England Journal of Medicine,1 and a three-year follow-up examined diabetes prevention.2 As a medicine it is licensed in the UK under the brand name Mounjaro and is prescription-only. Research-grade tirzepatide is the same molecule supplied as a lyophilised powder for laboratory work. It is not made, tested or released to medicines standards, so it is not Mounjaro and is never a substitute for it.
What a Certificate of Analysis is worth
Every box ships with a batch-specific COA from Janoshik or Freedom Diagnostic. Batch-specific is the part that matters: a certificate for a different lot tells you nothing about the vial in your hand. Check the batch number on the certificate against the number printed on your box, and check that the laboratory named on it will confirm the report if asked.
Why price per vial is the number to compare
Tirzepatide comes in more strengths than almost anything else in this catalogue, eleven from 5 mg to 120 mg, so a headline price is easy to make misleading. A price per box of ten is not comparable with a price per vial, and a price for 5 mg is not comparable with one for 60 mg. We publish price per vial and per box at every strength.
What delivery involves
We are UK-based, and orders ship tracked from our UK stock or direct from our verified manufacturer, depending on availability. Material shipped from outside the UK can be held, inspected or returned by customs; if that happens we reship a seized order once per customer at no cost, and a parcel whose tracking stalls is reshipped free.
References
- 1Tirzepatide Once Weekly for the Treatment of Obesity (SURMOUNT-1). N Engl J Med (2022). PMID 35658024
- 2Tirzepatide for Obesity Treatment and Diabetes Prevention. N Engl J Med (2025). PMID 39536238
Links open the record on PubMed or PubMed Central. These are citations to published research, not claims about this product.
Common questions
Is tirzepatide legal in the UK?
As a medicine, tirzepatide is licensed in the UK as Mounjaro and can only be supplied on prescription. Research-grade tirzepatide is laboratory material, not a licensed medicine, so there is no lawful route to supply it for human use. It is supplied here as research material only. Our guide to peptide legality in the UK sets out the distinction in full.
Is research tirzepatide the same as Mounjaro?
It is the same molecule but not the same product. Mounjaro is manufactured, tested and released under a marketing authorisation and comes in a pre-filled pen. Research-grade tirzepatide is a lyophilised powder in a sealed vial, made for laboratory use and verified by a batch Certificate of Analysis rather than by a medicines regulator.
How much does tirzepatide cost in the UK?
Research-grade tirzepatide starts at £3.42 ($4.50) per vial in a box of ten, with all eleven strengths priced per vial and per box on the product page. That is the price of laboratory material. It tells you nothing about the cost of a prescription, which is set by the pharmacy.
What strengths does tirzepatide come in?
Eleven: 5 mg, 10 mg, 15 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg, 80 mg, 100 mg and 120 mg, each in a box of ten vials.
Is there a minimum order?
No. One box of ten vials is a complete order.
From £3.42 / vial ($4.50)
Laboratory research use only. Free delivery worldwide over $750.
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