
Metabolic
Buy Retatrutide
Retatrutide (triple GIP/GLP-1/glucagon receptor agonist)
Also known as LY3437943 · GLP-3 · GLP-3 RT · Reta
Retatrutide is a single-molecule triple agonist acting at the GIP, GLP-1, and glucagon receptors. The inclusion of glucagon receptor agonism is mechanistically distinct from dual agonists: glucagon receptor activation is studied for effects on hepatic lipid handling and energy expenditure, pathways not engaged by incretin agonism alone. It remains investigational and is a frequent subject of comparative receptor-pharmacology work.
Research applications
- Triple receptor agonism and pathway-contribution studies
- Hepatic lipid metabolism research in preclinical models
- Energy expenditure and thermogenesis pathway assays
- Head-to-head comparison against dual agonists
Storage
Store lyophilized powder at -20°C protected from light. Reconstituted solution stable at 2-8°C for up to 30 days.
Reconstitution
Reconstitute with bacteriostatic water directed down the vial wall. Swirl gently until dissolved.
Published literature
161 papers indexed on PubMed for Retatrutide. Showing 6, reviews first.
- 01Retatrutide-A Game Changer in Obesity Pharmacotherapy
Katsi V et al. · Biomolecules · 2025
- 02What is the pipeline for future medications for obesity?
Melson E et al. · Int J Obes (Lond) · 2025
- 03Efficacy and Safety of GLP-1 Medicines for Type 2 Diabetes and Obesity
Drucker DJ · Diabetes Care · 2024
- 04Incretin-Based Weight Loss Pharmacotherapy: Can Resistance Exercise Optimize Changes in Body Composition?
Locatelli JC et al. · Diabetes Care · 2024
- 05Gut hormones and appetite regulation
Hong SH, Choi KM · Curr Opin Endocrinol Diabetes Obes · 2024
- 06
Indexed from PubMed, 2026-07-19. We link to sources rather than reproducing them.
Retatrutide questions
- Where can I buy retatrutide for research?
- Lyra Vital sells retatrutide as a lyophilized research peptide in 10 mg, 15 mg, 20 mg and 30 mg single vials, shipped from Orlando, Florida. Every lot's Janoshik Analytical certificate is published with its verification key, so the result can be confirmed with the laboratory directly. For research use only; not for human consumption.
- How do I buy retatrutide online from Lyra Vital?
- Choose a vial size on this page, add it to the cart and check out as a guest or with an account. Card payment is accepted, and the other available methods are listed at checkout. Orders ship from Orlando, Florida with a tracking number, and an order can be followed at lyravital.com/track. The certificate for each size is on this page before you pay. For research use only; not for human consumption.
- Has Lyra Vital's retatrutide been tested in its own name?
- Yes. Accurate Test Labs in Fort Lauderdale (ISO/IEC 17025) tested the 20 mg lot RT20-0727 at 99.96% purity and the 15 mg lot RT15-WM2607-001 at 99.85%, with identity confirmed and the endotoxin and heavy-metals panels passed. Both reports name Lyra Vital LLC as the client and are published in full at lyravital.com/lab-reports.
- Is retatrutide FDA approved?
- No. Retatrutide (Eli Lilly research code LY3437943) is investigational. Its Phase 3 TRIUMPH trials reported results during 2026 and Lilly has said it intends to seek approval, but it is not approved for any use. Lyra Vital supplies it strictly as research material.
- Is "GLP-3" the same thing as retatrutide?
- Yes. "GLP-3", "GLP-3 RT" and "Reta" are informal names some sellers use for retatrutide, after its three receptor targets (GIP, GLP-1 and glucagon). There is no separate compound called GLP-3. The identifiers that matter are the research code LY3437943 and CAS 2381089-83-2.
- Which certificate covers the vial size I order?
- The one for your vial's lot. Each size lists its own batch and certificate on this page, and the batch code printed on your vial returns that certificate in the lookup at lyravital.com/verify. The laboratory certifies a lot, not a fill weight, so the measured content on a report can differ from the label size. Where a size's certificate is not yet published, the page says so rather than borrowing another lot's.
- How do I check a retatrutide certificate myself?
- Take the task number and key from the certificate and enter them at janoshik.com/verification. The laboratory returns its own copy of the report. Lyra Vital neither issues nor hosts that result, so the check does not depend on us.
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Long-acting GLP-1 receptor agonist studied extensively for incretin pathway signaling and glucose regulation in preclinical models.
- Purity
- 99.728%
- 9 lab certificates

Tirzepatide
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- Purity
- 99.634%
- 13 lab certificates

Cagrilintide
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- Purity
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AOD-9604
5mg · COA published
C-terminal fragment of human growth hormone studied for lipolytic activity without the growth-promoting effects of the full hormone.
- Purity
- 99.783%
- 5 lab certificates
The certificate comes first
Every compound’s independent laboratory analysis is published before you buy, not sent on request.
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Each certificate carries a laboratory key. Enter a batch code and check it at the lab directly.
Ships from Orlando, FL
Orders dispatch within 1 business day of cleared payment, with tracking emailed when the parcel is handed to the carrier. Track any order, account or not.
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How Retatrutide compares
Side-by-side against the compounds researchers most often weigh it against, with price per milligram, mechanism and the published certificate for each.
Semaglutide vs Retatrutide
The two ends of the incretin design space: a selective GLP-1 analog against a triple agonist.
Tirzepatide vs Retatrutide
Dual versus triple agonism. The question is what glucagon receptor activation adds beyond incretin signaling.
AOD-9604 vs Retatrutide
Cagrilintide vs Retatrutide
Research goals that include Retatrutide
The research areas this compound is grouped under, each with the other compounds studied alongside it and the published certificates for the group.
Retatrutide
From $99