Research use only · in-vitro
Research peptides.Tested. Tracked.
Verified at an accredited external lab, dispatched same day from Manchester.
Free UK delivery over £40 · Royal Mail Tracked 24
How it works
Stocked here. Sent same day.
Same day
Dispatch from Manchester
Order any time, sent Royal Mail Tracked 24.
UK stock
Temperature-controlled
Held in the UK, free delivery over £40.
CoA
Signed, lot-matched
Published on the product page before you buy.
Retatrutide.
Supplied as lyophilised 10mg, 20mg and 30mg vials, with the signed lab certificate on the product page. Stocked in Manchester and sent Royal Mail Tracked the same day you order.
- Vial sizes
- 10 · 20 · 30mg
- Current batch
- 2026-07-15
- UK dispatch
- Same-day
Triple-agonist research peptide · For in-vitro research only.
Most-bought research peptides
Direct links to our most-requested research compounds. Every vial ships lyophilised with a batch-matched Certificate of Analysis.
Independently Verified
From synthesis to your bench.
Every lot is independently tested by an accredited external laboratory before dispatch. We do not rely on in-house testing alone.
Step 01
HPLC Purity
High-Performance Liquid Chromatography quantifies the active peptide content of every lot, reported to 0.1 percent. Anything beneath our 98% release floor is destroyed in-house. It never reaches a vial. Current lots measure 99.99%.
Step 02
Mass Spectrometry
Mass-spec confirms the molecular weight matches the declared sequence exactly. It is the test that catches misidentified, substituted or oxidised material before a single milligram is filled.
Step 03
External Verification
Both checks are then re-run by an accredited independent laboratory. The signed certificate is linked from the product page.
What every order looks like.
Third-party tested
Independent QC on every batch before it ships.
Same-day dispatch
Order any time, sent Royal Mail Tracked 24.
Every lot traceable
A signed Certificate of Analysis on the page.
Free UK delivery
Over £40. Under that, £3.99 tracked.
Categories
Browse by category.
UK Buyer's Guides
Sourcing peptides in the UK.
Plain-English guides to the compounds most sourced by British research groups: what each peptide is, what to demand from a supplier, and how to read a Certificate of Analysis properly.
Earn 30% of every order you refer, for as long as they keep ordering.
Our peptide affiliate programme pays 30% on every order placed through your link, including every reorder that customer ever makes. No minimum withdrawal, no thirty-day hold, paid by UK bank transfer.
FAQ
Here's what you should know.
Everything researchers most commonly ask before placing their first order. Can't find the answer? Email admin@uk-peptides.org.
Yes. Research peptides are supplied legally in the United Kingdom for in-vitro laboratory work. They are not licensed medicines under the MHRA and are not intended for human or veterinary use. All buyers must be 18 or older and ordering for a research context.
Every batch is verified by an accredited independent laboratory using HPLC-UV and mass spectrometry, and the Certificate of Analysis is linked from each product page. The exception is new products still waiting on their lab report (currently Tesamorelin and PT-141).
It means 99.99% of the powder in the vial is the peptide named on the label, with the rest being related impurities from synthesis. The figure comes from high-performance liquid chromatography: the material is separated into its components and each one measured, so the number is a measurement rather than an estimate. The chromatogram itself is printed on the Certificate of Analysis, so you can see the peak shape and not just the percentage.
Our release floor is 98% HPLC purity. Anything below it is rejected and never leaves the laboratory. In practice the current lots measure well above it: every published certificate reads 99.99%. The exact figure for your lot is printed on the Certificate of Analysis you can view on the product page.
Qualified researchers, university groups, contract labs and independent investigators based in the UK. Placing an order confirms you are 18+ and that the material will be used solely for in-vitro research.
Every order is dispatched the same day with Royal Mail Tracked 24, whatever time you place it. Most UK addresses receive the parcel the next working day; the Highlands and Islands can take an additional 24 hours.
Lyophilised peptides arrive as a dry powder and have to be reconstituted before use. Bacteriostatic water is sterile water containing 0.9% benzyl alcohol, and the preservative is what lets a vial be drawn from more than once without the contents spoiling. Plain sterile water has no preservative, so it is single-use. If you are ordering a lyophilised vial and do not already hold diluent, you need this too.
Vials are held at −20°C from goods-in until dispatch, then sent in plain, unbranded outer packaging with no indication of the contents. Lyophilised peptide is stable in transit; transfer it to −20°C storage on arrival.