Cagrilintide vs Retatrutide
Cagrilintide and Retatrutide are compared here on the things that actually differ between them: what class each belongs to, what each acts on, how each is supplied and what each costs per milligram. Where the registry has no figure for one of them the row is left out rather than filled in.
Side by side
| Cagrilintide | Retatrutide | |
|---|---|---|
| Class | Long-acting amylin analogue | Triple GIP/GLP-1/glucagon receptor agonist |
| Acts on | An analogue of amylin, the pancreatic hormone co-secreted with insulin. Studied for satiety signalling through a mechanism separate from GLP-1, which is why the two are researched in combination. | A single peptide with agonist activity at three receptors: GIP, GLP-1 and glucagon. The glucagon component is what distinguishes it from dual agonists such as tirzepatide. |
| Supplied as | Pre-filled pen or lyophilised vial. | Lyophilised vial, or pre-filled pen graduated in dial units. |
| Half-life | Long, supporting weekly intervals. | Long, supporting weekly intervals in clinical study design. |
| Storage | Refrigerated, protected from light. | Refrigerated. Pens must not be frozen. Protect from light. |
| Listings | 1 | 4 |
| Price from | £85 | £160 |
What actually differs
The clearest difference is class: Cagrilintide is a Long-acting amylin analogue, Retatrutide is a triple GIP/GLP-1/glucagon receptor agonist. They are not supplied the same way. Cagrilintide comes as a Pre-filled pen or lyophilised vial, Retatrutide as a lyophilised vial, or pre-filled pen graduated in dial units. Half-life differs as well: Long, supporting weekly intervals for Cagrilintide against Long, supporting weekly intervals in clinical study design for Retatrutide.
- SerenQ Cagrilintide 15mg Peptide Penout of stock£85
Quanta Pharma Retatrutide 30mg + Free BWin stock£160- SerenQ Retatrutide Penin stock£210
VLS Retatrutide Penin stock£220
Quanta Pharma Retatrutide 50mg + Free BWin stock£225
Availability checked 2026-09-09. The product page carries live stock.