For research purposes only · UK produced
Back to catalogue
Reta 30 mg retatrutide pen — retail box, angle view
Research use only
30 mg
UK-made research peptide Triple-agonist

Reta 30 mgPre-mixed retatrutide research pen

A single pre-loaded multi-dose pen of 30 mg retatrutide, mixed under inert atmosphere in a UK facility and released only after independent HPLC verification. No powders, no bacteriostatic water, no reconstitution maths — dial, dispense, document.

  • Triple-receptor research target (GLP-1 / GIP / Glucagon)
  • Pre-mixed pen — zero reconstitution, zero powder loss
  • HPLC ≥ 99% verified, batch released from a UK facility

£129.99

£199.99

Save 35%Inc. tracked cold-chain delivery

Quantity

1

Variant

30mg

UK produced
Cold-chain
Tracked shipping
HPLC ≥99%
UK synthesised
HPLC ≥ 99%
Cold-chain dispatch
Tracked UK shipping

Not for human consumption. Supplied solely for in-vitro and laboratory research by qualified personnel. Read the research-use FAQ

Kurt, founder of PeptOnline

Why we made Reta

"After 18 months researching retatrutide myself, I built the supply I wished existed."

I spent over a year sourcing retatrutide as a researcher and ran into the same three problems every time: inconsistent powder weights, fragile cold-chain, and zero traceability back to the lab. PeptOnline is the answer to that — a UK-synthesised, pre-mixed pen with the data sheet attached and the temperature strip to prove it.

— Kurt, founder · PeptOnline

The compound

Retatrutide, plainly explained.

Retatrutide is a long-acting research peptide that activates three incretin and metabolic receptors at once: GLP-1, GIP and glucagon. That triple-agonist profile is what makes it interesting in metabolic-research circles — single-receptor and dual-agonist compounds have been studied for years; reta is the next generation researchers are now reading about in the literature.

The pen you're looking at contains 30 mg of retatrutide pre-mixed in a stabilised aqueous matrix. That removes the most common source of error in peptide research: reconstituting lyophilised powder by hand. No weighing, no bacteriostatic water mismatch, no adsorption loss in a syringe barrel.

Every pen is filled, sealed and serialised in a UK facility, then released against independent HPLC and mass-spec assays. The pen ships in an insulated cold-chain pack with a temperature strip you can verify before it ever touches a freezer.

"Every batch HPLC-verified in a UK lab. Shipped cold. No reconstitution required."

The PeptOnline standard

At a glance

Reta 30 mg — data sheet

Compound
Retatrutide (Reta)
Strength
30 mg total peptide content
Format
Pre-loaded, pre-mixed multi-dose research pen
Presentation
Single pen, ready for laboratory dispensing
Origin
Synthesised and assembled in the United Kingdom
Batch testing
HPLC ≥ 99% purity, mass-spec verified, endotoxin tested
Storage
Refrigerate 2–8°C. Protect from light. Do not freeze.
Intended use
In-vitro / laboratory research only. Not for human or animal consumption.

How it works

From cold-chain box to bench, in three steps.

  1. 01

    Receive cold

    Insulated pack, temperature strip on the carton, tracked UK courier.

  2. 02

    Refrigerate

    Store the sealed pen at 2–8 °C. Stable across the full research window.

  3. 03

    Dial and dispense

    Fine-graduation dial. Same concentration, every session.

Why pre-mixed

Reconstituted powder vs. PeptOnline pen.

Traditional lyophilised vial

  • Source lyophilised vial + separate bacteriostatic water
  • Calculate concentration, reconstitute, swirl (no shaking)
  • Draw with insulin syringe — pray your maths is right
  • Recap, refrigerate, hope stability holds across the study

PeptOnline pre-mixed pen

  • Unbox cold-chain pack, verify temperature strip
  • Refrigerate the sealed pen at 2–8 °C
  • Dial the dose — no maths, no reconstitution
  • Same pen, same concentration, every research session

Deep data

Full specification

Verified feedback

Researcher reviews

JD

James D.

2 weeks ago
Verified

Cold-chain held up perfectly

Pen arrived chilled with the temperature strip in spec. Our in-house HPLC matched the certificate within tolerance.

SR

Sarah R.

1 month ago
Verified

Pre-mixed is the upgrade

Switching off lyophilised powder removed a whole class of error from our protocol. Same concentration draw after draw.

MK

Dr. M. Khan

3 weeks ago
Verified

Reliable UK source for reta

Hard to find a UK lab actually willing to attach a certificate. The pen format makes documenting research sessions trivial.

TW

Tom W.

5 days ago
Verified

Dial graduation is excellent

Fine-graduation dial means we can run dose-response work straight off the pen. Cold-pack courier turned up next day.

AL

Dr. A. Lee

2 months ago
Verified

No reconstitution = no errors

We used to lose 8–10% of compound to reconstitution variance. With the pre-mixed pen our intra-session CV has dropped sharply.

NC

Nina C.

1 week ago
Verified

Tracked dispatch is a relief

Tracking pinged the whole way. Insulated box, cold packs solid on arrival. Quality matches the spec sheet exactly.

Common questions

Reta — quick answers

Read the full research-use FAQ

Ready to order

Add Reta 30 mg to your research stack.

UK-synthesised, HPLC-verified, cold-chain dispatched. One pre-mixed pen, one concentration, one source — every session.

For research use only · Not for human or animal consumption