Featured · No. 013In stock
Weight & Metabolic · Vial
Retatrutide
GLP-1 / GIP / glucagon triple receptor agonist
- Size
- 40 mg
- HPLC
- 99.2%
- Lot
- 07022601
- Per mg
- £3.50/mg
£139.99
Certificate for lot 07022601 ↗
Lyophilised research peptides · UK stock
Research peptides,
Research peptides,
tested by the lot.
Dispatched today.
16 compounds held in the UK, each lot published with its certificate of analysis and matched to the number on the label. Order before 1pm Monday to Friday and it leaves the same day.
- 99.6% median HPLC, published lots
- 1pm same-day cut-off
- Up to 20% off stacks
Same-day dispatch closes in1pm cut-off
08:001pm cut-off
- UK delivery2 to 3 working days
- Europe3 to 7 working days
- Free deliveryon orders over £100
- Plain packaginginsulated where needed
§ 01
View all 19 →Best sellers
NewNo. 013
Retatrutide
GLP-1 / GIP / glucagon triple receptor agonist
- Size
- 4 sizes
- HPLC
- 99.2%
- Lot
- 07022601
£139.99£3.50/mg
Options 
Best sellerNo. 001
No. 007
MOTS-c
Mitochondrial open reading frame of the 12S rRNA-c
- Size
- 40 mg
- HPLC
- 99.83%
- Lot
- 10377
£74.99£1.87/mg
No. 005
No. 002
StackNo. 003
Wolverine Stack
BPC-157 5 mg + TB-500 5 mg, two vials
- Size
- 5 mg + 5 mg
- HPLC
- ≥99%
- Lot
- per vial
£37.99£3.80/mg
No. 011
NewNo. 009
NAD+ & B12 Pen
Synedica pre-filled pen: 1,000 mg NAD+ with 4,000 mcg vitamin B12
- Size
- 1,000 mg + 4,000 mcg
- HPLC
- n/a
- Lot
- on request
£119.99
§ 02
All categories →Shop by research area
StacksTwo or more compounds,
Two or more compounds,
automatic savings.
Two compounds in one order earn 10% off the peptide lines, three earn 15%, four or more earn 20%. Applied automatically at checkout. Start from a preset (Wolverine, GLOW-as-vials, Focus, Longevity) or pick your own.
Build a stack →10%2 compounds
15%3 compounds
20%4+ compounds
§ 03
Quick order
The full catalogue on one sheet. Add straight to the bag.
No.ProductHPLCLotPrice
§ 04
Check your lot
Every vial carries a lot number. Enter it to open the certificate for the batch you received.
§ 05
Research peptides in the UK: what to check before you buy
The UK research-peptide market is large, unregulated and uneven. Most vendors resell imported lyophilised powder on the manufacturer's own paperwork, or on none. Four things separate a supplier worth using from one that is not: a certificate of analysis for the specific lot you receive, published so you can read it, with the lot number on the vial and ideally an independent laboratory's confirmation on top of the manufacturer's; stock physically held in the UK so that dispatch is same-day and nothing sits in customs; a registered UK company you can contact; and a clear research-use policy that the vendor actually follows. ALTA PEPTIDES was built to meet all four. Every product page shows the specification, the certificate for the current lot and the storage conditions, and our own independent third-party test of each lot is being added to the same page as it arrives.
The UK vial market runs on trust in strangers. We replace it with paperwork: the certificate for the lot in your hand, published as received with the issuer named, and ALTA's own independent test of that lot added as it arrives. Purity by HPLC is on every certificate, with the lot number on your vial. Parcels go out in an unbranded outer box, insulated where the compound needs it, signature-free unless you ask. For reconstitution arithmetic without the forum spreadsheets, the peptide calculator turns vial amount, diluent volume and target amount into millilitres and syringe units. Comparing suppliers? Our guides to buying peptides in the UK and to research peptides UK set out every check, and retatrutide UK covers the most-asked-about compound.
§ 06
All articles →Read before you order
9 October 2026 · 8 min read
Apitegromab explained: the first approved muscle-protecting antibody, and what it means for weight loss
Apitegromab is Scholar Rock's antibody that stops the body's main muscle brake, myostatin, from switching on. It became the first drug of its kind ever approved, for the muscle-wasting disease SMA in the US in September 2026. In obesity it doesn't add weight loss: with tirzepatide, it made more of the weight lost come from fat and less from muscle. What it is, what the trials show, and whether you can get it.
Read → 9 October 2026 · 9 min readApitegromab and bodybuilding: can a myostatin blocker really build muscle?
Myostatin is the body's brake on muscle, and animals born without it are famously huge. That is why bodybuilders are curious about apitegromab, the first approved drug that blocks it. But in people, myostatin blockers have added only modest muscle, rarely more strength, and none has ever been tested in healthy or trained adults. What the evidence really shows, the risks, and why it is banned in sport.
Read → 9 October 2026 · 10 min readWhat is retatrutide? The triple-hormone peptide, explained simply
Retatrutide, often shortened to reta, is Eli Lilly's experimental once-weekly peptide that acts on three appetite and metabolism hormones at once: GLP-1, GIP and glucagon. In its largest phase 3 trial, people on the highest amount lost 28.3% of their body weight on average over 80 weeks. What it is, how it works, the results, the side effects and where it stands.
Read →Research use only
Every product on this site is sold as a laboratory reagent for in-vitro and analytical research. Not for human or veterinary use, not a medicine, not a supplement. By ordering you confirm you are 18 or over and accept our research use policy.