Retatrutide Reconstitution: Diluent Choice, Concentration Table, and Stability
Reviewed by the VendPeptides Editorial Team. Written from product labeling, the batch certificate of analysis and published literature. Last updated October 2026.
Retatrutide is a synthetic GLP-1/GIP/glucagon receptor triple agonist peptide supplied as a lyophilized powder for laboratory research.
It has been studied in a phase 2 trial of triple-hormone-receptor agonism and appears in ongoing registered clinical studies.
The compound is also known as LY3437943, GGG tri-agonist, or triple agonist (CAS 2381089-83-2), and is sold here in 5 mg, 10 mg, 15 mg, 20 mg, 30 mg, 40 mg, 50 mg, and 60 mg vials.
This guide covers what Retatrutide Reconstitution involves, concentration math by vial size, safe laboratory handling, and where to buy.
What is Retatrutide Reconstitution?
Retatrutide Reconstitution is the laboratory process of adding a measured volume of diluent to a lyophilized Retatrutide vial to produce a known peptide concentration in mg/mL. For research purposes only. Not for human consumption.
The powder is dissolved with a suitable diluent, typically bacteriostatic water or sterile water, and the resulting solution is expressed as a concentration rather than a fixed amount. Because the vial contains a fixed mass of peptide, the final concentration depends entirely on the volume of diluent added.
Retatrutide is a GLP-1/GIP/glucagon receptor triple agonist. Its published characterization appears in the phase 2 literature and in registry entries, and the batch certificate of analysis (COA) supplied with each vial is the authoritative record of identity, purity, and mass.
Retatrutide Reconstitution, LY3437943 and GGG tri-agonist: are they the same?
Yes. Retatrutide, LY3437943, GGG tri-agonist, and triple agonist all refer to the same molecule, CAS 2381089-83-2.
LY3437943 is the development code used in the published literature and in registry listings, while GGG tri-agonist and triple agonist are descriptive shorthand for its GLP-1, GIP, and glucagon receptor activity. None of these names indicates a different salt, ester, or formulation.
For laboratory purposes, the vial label and batch COA are the definitive identifiers. For research purposes only. Not for human consumption.
What has Retatrutide Reconstitution been studied for?
Retatrutide has been studied in a phase 2 trial of triple-hormone-receptor agonism, and additional studies are registered on ClinicalTrials.gov. The published work describes the molecule's pharmacology and its activity at three receptor targets.
This product is a research chemical. It is not approved for any medical or veterinary purpose, and it is not for human or veterinary use.
Readers should consult the published literature and the batch certificate of analysis (COA) for identity, purity, and analytical data. The COA accompanying each vial takes priority over any general description.
Retatrutide Reconstitution and concentration by vial size
Adding 2 mL of bacteriostatic water to a 10 mg vial gives 5 mg/mL.
| Vial size | 10-vial kit total | Diluent added | Resulting concentration | µg per µL |
|---|---|---|---|---|
| 5 mg | 50 mg | 1 mL (1,000 µL) | 5 mg/mL | 5 µg/µL |
| 10 mg | 100 mg | 2 mL (2,000 µL) | 5 mg/mL | 5 µg/µL |
| 20 mg | 200 mg | 2 mL (2,000 µL) | 10 mg/mL | 10 µg/µL |
| 40 mg | 400 mg | 2 mL (2,000 µL) | 20 mg/mL | 20 µg/µL |
| 60 mg | 600 mg | 3 mL (3,000 µL) | 20 mg/mL | 20 µg/µL |
The vial label and the batch certificate of analysis (COA) take priority over any table.
Retatrutide Reconstitution 10mg vial
A 10 mg vial reconstituted with 2 mL (2,000 µL) of diluent yields 5 mg/mL, or 5 µg/µL. Halving the diluent to 1 mL (1,000 µL) doubles the concentration to 10 mg/mL.
Record the exact diluent volume on the vial label so the concentration can be recalculated later. For research purposes only. Not for human consumption. Confirm the actual fill mass against the batch COA before calculating.
Retatrutide Reconstitution 5mg vial
A 5 mg vial reconstituted with 1 mL (1,000 µL) of diluent yields 5 mg/mL, or 5 µg/µL. Using 2 mL (2,000 µL) instead yields 2.5 mg/mL.
Smaller vials are convenient when a lower total mass is required for a study. The batch COA remains the reference for the exact peptide content.
How long does reconstituted Retatrutide stay stable?
Stability after reconstitution depends on the diluent, storage temperature, and handling, so the batch COA and the vial label are the only reliable references for a given lot.
Lyophilized powder is generally stored cold and protected from light, while reconstituted solution is typically kept refrigerated and handled with sterile technique. Follow the storage statement on the label and the COA rather than a general rule.
How to handle Retatrutide safely in the laboratory
- Read the batch certificate of analysis (COA) and the vial label before opening the vial.
- Work in a clean, designated area with appropriate personal protective equipment.
- Wipe the vial septum and the diluent container with an appropriate laboratory disinfectant.
- Add the measured diluent slowly down the inside wall of the vial to avoid foaming.
- Swirl gently until the powder is fully dissolved; do not shake the vial.
- Label the vial with the compound name, concentration, diluent, and date of reconstitution.
- Store the reconstituted solution according to the label and COA, and log the lot number.
Warning: Poor sterile technique or unlabeled vials can lead to contamination, mix-ups, and invalid experimental results.
Is Retatrutide the same as Tirzepatide?
No. Retatrutide is a GLP-1/GIP/glucagon receptor triple agonist, while Tirzepatide is a dual GLP-1/GIP receptor agonist; they are different molecules with different receptor activity.
They are not interchangeable in laboratory work, and their analytical data, COAs, and published literature are separate. For research purposes only. Not for human consumption.
For a related dual-agonist reference, see Tirzepatide 20mg Vial: Specifications, Reconstitution, and Storage.
Is Retatrutide safe for humans?
No. This product is sold for research purposes only and is not for human consumption; it is not approved for any medical or veterinary purpose as sold.
FDA guidance on research chemicals addresses labeling and the 'not for human consumption' statement, and these materials are not finished drug products. For research purposes only. Not for human consumption.
Any question about human health belongs with a licensed healthcare professional, and any laboratory question belongs with the batch COA and the published literature.
Can Retatrutide be used for pets or animals?
No. This product is a research chemical and is not a veterinary product; it is not approved for any medical or veterinary purpose.
For research purposes only. Not for human consumption. It must not be given to pets, livestock, or any other animal.
For any animal health question, consult a licensed veterinarian.
Where to buy Retatrutide (5 mg, 10 mg, 15 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg)
Our Retatrutide is supplied as a lyophilized powder in 5 mg, 10 mg, 15 mg, 20 mg, 30 mg, 40 mg, 50 mg, and 60 mg single vials, shipped from a US warehouse with a batch certificate of analysis and expiry on every label.
Choose Retatrutide Single Vial for the strength your study requires, and browse the full Metabolic Research Peptides collection for related research materials.
Related laboratory products include BPC-157 and the 20 mg format described in Retatrutide 20mg Vial: Specifications, Reconstitution, and Storage.
For research purposes only. Not for human consumption. See also the Research Peptide Roundup: October 2026: New Publications, Regulatory Updates, and Catalogue Changes.
Frequently asked questions
Is Retatrutide Reconstitution safe for humans?
No. This product is for research purposes only and is not for human consumption; it is not approved for any medical or veterinary purpose as sold. Any human health question should go to a licensed healthcare professional.
Is Retatrutide the same as Tirzepatide?
No. Retatrutide is a GLP-1/GIP/glucagon receptor triple agonist, while Tirzepatide is a dual GLP-1/GIP receptor agonist, so they are different molecules. Their COAs and published data are separate.
How do you perform Retatrutide Reconstitution on a 10 mg vial?
Add 2 mL (2,000 µL) of diluent to a 10 mg vial to obtain 5 mg/mL, or 5 µg/µL. Record the diluent volume on the label and confirm the fill mass against the batch COA.
Can Retatrutide be used for pets or animals?
No. It is a research chemical, not a veterinary product, and it is not approved for any medical or veterinary purpose. For research purposes only. Not for human consumption. Consult a licensed veterinarian for any animal health question.
Is Retatrutide the same as LY3437943?
Yes. Retatrutide, LY3437943, GGG tri-agonist, and triple agonist refer to the same molecule, CAS 2381089-83-2. The vial label and batch COA are the definitive identifiers.
Is Retatrutide a peptide, and what class is it?
Yes. Retatrutide is a synthetic peptide classified as a GLP-1/GIP/glucagon receptor triple agonist. It has been studied in a phase 2 trial and in registered clinical studies.
Can you still buy Retatrutide?
Yes. It is available here as a single vial in 5 mg, 10 mg, 15 mg, 20 mg, 30 mg, 40 mg, 50 mg, and 60 mg strengths, shipped from a US warehouse with a batch COA and expiry on every label. For research purposes only. Not for human consumption.
Sources and further reading
- Jastreboff AM et al. Triple-Hormone-Receptor Agonist Retatrutide for Obesity — A Phase 2 Trial. NEJM 2023.
- ClinicalTrials.gov — Retatrutide (LY3437943) studies
- PubChem — Retatrutide
Disclaimer. This article is educational and describes laboratory handling and published literature only. It is not medical or veterinary advice and is not a substitute for a licensed professional. For research purposes only. Not for human consumption. Products are sold to qualified researchers for in-vitro and laboratory research, are not approved drugs, foods, cosmetics or devices, and are not for human or animal use. This article was written with AI assistance and reviewed by a member of the VendPeptides Editorial Team.