99.7% purityGLP-1 Agonists
Retatrutide 20mg Pen 3/mL | Made to Order | Comes with COA 99.7% Purity
🚚 Free UK shipping over £100 · dispatched next business day · 🔔 Get stock alerts
- ✓ Independently HPLC + MS verified — per-batch Certificate of Analysis
- ✓ Pay by Bank (Fena / Wallid) or bank transfer (BACS)
⚠ For laboratory research use only. Not for human or veterinary use. Must be 21+ to purchase.

Retatrutide 20mg Pen | Made to Order | When ordering please leave a note of how many pins you require.
Retatrutide is a novel 39-amino acid peptide developed as a triple receptor agonist (GLP-1, GIP and glucagon receptors). This listing supplies Retatrutide as a 20mg made-to-order research peptide pen at ≥99.69% verified purity for advanced laboratory research use. It is widely studied for its roles in metabolic regulation, energy balance and related pathways in preclinical models.
Made to Order
Each Retatrutide 20mg Pen is produced to order to ensure freshness and dosing accuracy of the research material. Please allow additional handling time before dispatch (estimated lead time shown at checkout). As a bespoke, made-to-order item, return terms may differ from stocked products — see our refund policy before ordering.
Key Details
- Quantity: Retatrutide 20mg Pen
- Format: Made-to-order research peptide pen (reconstitution/handling notes supplied with the order)
- Purity: ≥99.7% (HPLC verified)
- Intended Use: For research purposes only — not for human consumption, diagnostic, therapeutic, or any other non-laboratory use.
Important Compliance Note This product is sold strictly for in vitro or laboratory research. It has not been approved by the MHRA, FDA or equivalent regulatory bodies for human use. Always follow all applicable laws and institutional guidelines when conducting research. Suitable for qualified researchers and institutions studying metabolic biology, obesity models, and incretin/glucagon pathways. Buyers must be 21 or over and operate within local research regulations. Misuse is strictly prohibited.
Chemical Compound Information
- Chemical Name: Retatrutide (LY3437943)
- Sequence: A modified 39-amino acid peptide with specific fatty-acid acylation and amino-acid substitutions designed for triple agonism (exact sequence is proprietary but publicly referenced in research literature).
- Molecular Formula: C₂₂₃H₃₃₃N₅₃O₆₆ (approximate for the peptide)
- Molecular Weight: Approximately 4,731.4 Da (per batch Certificate of Analysis)
- Classification: Synthetic multi-receptor agonist peptide
- CAS Number: 2381089-83-2
- Format: Retatrutide 20mg Pen
Area of Interest Laboratory studies of Retatrutide have investigated a variety of areas in preclinical models:
- Metabolic Regulation: Studied as a triple agonist in models of glucose control, appetite signalling, and energy expenditure.
- Weight-Management Models: Examined for effects on body weight and fat mass in preclinical animal models.
- Incretin & Glucagon Pathways: Investigated for synergistic activation of GLP-1, GIP, and glucagon receptors.
- Cardiometabolic Research: Explored for lipid metabolism, liver health, and cardiovascular parameters in research settings.
Technical Specifications
- Quantity: 20mg
- Format: Made-to-order research peptide pen
- Purity: ≥99.69% (HPLC)
- COA: Provided with each batch (includes HPLC chromatogram and mass spectrometry identity confirmation)
Storage Guidelines for Retatrutide 20mg Pen
- Liquid Retatrutide with Bacteriostatic Water – Store at 2c – 8c.
- DO NOT FREEZE
- Once reconstituted (Dispatched), Use within 30 days.