Retatrutide Pre-filled Pen 20mg Metabolism
The XL size, ready to use.
- In stock in France
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Your complete kit
- 20mg penIn the box
- 4 needlesIn the box
- Nothing else to buyReady to use
The solution is ready and the needles are included. Keep the pen in the fridge (2 to 8 °C).
Frequently bought together
Research Use Only (RUO) · Prohibited for human or veterinary use.
Key facts
Protocol and preparation
Warning Theoretical tool for chemical handling. Does not constitute medical advice.
- The pen carries a handwritten marking: the product initials and its strength. This is our marker on the pen body. Check that it matches your order.
- The needles are in the box, not on the pen. Four screw-on needles, a new one for each use.
- The liquid is clear and colourless, sometimes with a small air bubble. That is expected. Priming, before first use, clears the bubble.
- The parcel is plain. Nothing on the outside indicates the contents or the brand name.
What is not normal: cloudy or coloured liquid, visible particles, a cracked pen or a dial that will not turn. In those exact cases, write to us with a photo and we will take the pen back.
A pre-filled pen requires no reconstitution. The solution is ready to use: no powder to dissolve, no bacteriostatic water to add, no volume to calculate. That is the essential difference from a vial.
Technical data
- Reconstitution
- Prêt à l'emploi, aucune reconstitution. Molette graduée de 1 à 60 unités : 1 unité = 66,7 mcg, 30 unités = 2 mg, 60 unités = 4 mg. Le stylo contient 3 ml, soit 300 unités au total. Le liquide est de l'eau bactériostatique : rien à ajouter, rien à mélanger.
- Peptide sequence
- YXQGTFTSDYSILLDKKAQXAFIEYLLEGGPSSGAPPPS-NH2 (X = Aib ; lysine acylée)
- Molecular formula
- C221H342N46O68
- Molecular weight
- 4731.34 g/mol
- CAS number
- 2381089-83-2
- Physical form
- Stylo pré-rempli, solution prête à l'emploi
- Recommended solubility
- Aucune reconstitution : la solution est prête, la dose se règle à la molette
- Storage conditions
- +2°C à +8°C, ne pas congeler, à l'abri de la lumière. Se conserve 1 an.
- Use
- Research reagent, in vitro only (RUO)
Storage & handling
Store the pen between +2 °C and +8 °C, refrigerated and away from light. This is an important difference from lyophilised powder, which tolerates room temperature: a pen contains an already-reconstituted solution and therefore requires continuous refrigeration.
Never freeze it. A solution that has been frozen and thawed should be discarded, even if it looks normal.
It tolerates a few hours out of the fridge during transport, between the delivery point and home. Return it to the cold as soon as you receive it.
Mechanism of action
Retatrutide acts simultaneously on three receptorsGLP-1, GIP and glucagon. This triple action distinguishes it from GLP-1-only agonists such as semaglutide, and from dual GLP-1/GIP agonists such as tirzepatide. Published work covers glycaemic regulation, gastric emptying and energy expenditure. This is a research compound: available data come from ongoing clinical studies and do not constitute a therapeutic indication.
Frequently asked questions
Do I need to add bacteriostatic water?
What if the pen has been left out of the fridge?
Is the content the same as in your vials?
The complete guideRetatrutide (LY3437943): complete guide to the triple agonistRead the guide 