Precision. Purity. Performance.

Premium Retatrutide pens for modern research

High purity, third-party tested and batch verified. Prefilled pens designed for researchers who demand more.

Retatrutide prefilled pen
>99% HPLC purityThird-party tested COACold-chain EU shipping18+ research use only
Prefilled pens

Choose your strength

Every pen is prefilled to a fixed concentration for reproducible click-to-volume dialling. Prices include a per-batch Certificate of Analysis.

20 mg pen Retatrutide

20 mg pen

Entry strength
€210
per prefilled pen
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Most popular
30 mg pen Retatrutide

30 mg pen

Most popular
€260
per prefilled pen
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60 mg pen Retatrutide

60 mg pen

Maximum strength
€350
per prefilled pen
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Also available: 50 mg pen for €315. See all options on the product page.

Why Retapen

Built for reproducible research

Every Retapen pen is prepared for consistency and comes documented, so your results start from a known, verified baseline.

Prefilled & consistent

Each pen is prefilled to a fixed concentration for reproducible click-to-volume dialling across your work.

>99% purity (HPLC)

Material is characterised by HPLC so you know exactly what you are working with, batch after batch.

Certificate of Analysis

A third-party Certificate of Analysis is available per batch, with identity, purity and verification details.

Cold-chain handling

Stored and shipped cold (2–8°C) and protected from light to preserve integrity in transit.

Clear dosing math

Our pen-click calculator converts pen strength and target amount into exact clicks — no guesswork.

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Discreet & secure

Fast EU shipping (1–2 business days) and secure payment via Stripe & iDEAL.

Free tool

Dial the exact dose, every time

Enter your pen strength and target amount and the pen-click calculator returns the exact number of clicks per administration and doses per pen.

Open the calculator
Support

Frequently asked questions

What is Retatrutide?
Retatrutide is a synthetic peptide studied as a GLP-1/GIP/glucagon receptor triple agonist. It is an investigational research compound and is supplied here strictly as a laboratory reference material.
Is this product for human use?
No. It is sold for laboratory and research use only — not for human or veterinary use, and not for diagnostic or therapeutic purposes. It has not been evaluated or approved by the FDA or EMA.
What does “prefilled pen” mean?
The peptide is supplied dissolved and ready in a pen-format container at a fixed strength, so volumes can be dialled reproducibly for research handling. Use our pen-click calculator to convert pen strength and target amount into exact clicks.
Do you provide a Certificate of Analysis?
Yes. A third-party Certificate of Analysis is available per batch, showing identity, HPLC purity (>99%) and verification details. You can open it from the COA link on the product.
How should it be stored?
Store cold at 2–8°C and protect from light. Ships cold-chain within the EU, typically in 1–2 business days.
How can I pay?
Payments are handled securely via Stripe and iDEAL. You must be 18 or older to order.
For laboratory and research use only. Not for human or veterinary use, and not for diagnostic or therapeutic purposes. This product has not been evaluated or approved by the FDA or EMA and is not a medicine. You must be 18 or older to order.

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