In stock and ready to ship. Buy Tirzepatide (TIRZ) 120mg online from Dr Jays Peptides — third-party tested, with a certificate of analysis available on request. Order by 4:00 PM ET Monday–Friday or 12:00 PM ET Saturday and it ships the same day with tracking.
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Tirzepatide for Sale — Research-Grade, Third-Party Tested
Looking to buy Tirzepatide? Dr Jays Peptides offers Tirzepatide (TIRZ) for sale as a third-party lab-tested research peptide sourced direct from the manufacturer, with same-day U.S. shipping. Veteran-owned and trusted by researchers (Trustpilot 4.8).
TIRZ — Tirzepatide (Lyophilized Research Peptide, 5mg–120mg)
TIRZ (Tirzepatide) is a dual GIP and GLP-1 receptor agonist peptide studied in metabolic and endocrinology research models. It is widely explored for its combined action on glucose-dependent insulin secretion and appetite-related signaling pathways.
Due to its dual-receptor activity, Tirzepatide is commonly investigated in research focused on metabolic efficiency, glucose control mechanisms, and energy balance regulation. For background on how these receptor pathways are studied, see our tirzepatide research guide and our overview of GLP-1 research peptides.
Tirzepatide Specifications
| Peptide | Tirzepatide (TIRZ) |
| CAS Number | 2023788-19-2 |
| Molecular Formula | C₂₂₅H₃₄₈N₄₈O₆₈ |
| Molecular Weight | ~4813.5 g/mol |
| Receptor Class | Dual agonist (GIP receptor + GLP-1 receptor) |
| Purity | Third-party tested — see Certificate of Analysis |
| Form | Lyophilized powder |
| Vial Sizes | 5mg, 10mg, 15mg, 20mg, 30mg, 60mg, 120mg |
| Storage | Store at -20°C; after reconstitution, refrigerate at 2–8°C and use within 30 days (reconstitution method) |
Potential Research Applications:
- Metabolic pathway and glucose regulation studies
- GIP and GLP-1 receptor interaction research
- Energy balance and appetite signaling models
- Insulin response and endocrine function investigations
How Tirzepatide Compares to Other GLP-1 Research Peptides
Tirzepatide is a dual agonist acting on the GIP and GLP-1 receptors — one more pathway than semaglutide (GLP-1 only) and one fewer than retatrutide (GLP-1/GIP/glucagon). For a side-by-side of dose ranges and trial outcomes, see semaglutide vs tirzepatide.
| Compound | Receptor Targets | Research Class |
|---|---|---|
| Tirzepatide (TIRZ) | GLP-1 + GIP | Dual agonist |
| Semaglutide (SEMA) | GLP-1 | Single agonist |
| Retatrutide (RETA) | GLP-1 + GIP + Glucagon | Triple agonist |
Selected Research Literature
Tirzepatide is among the most heavily published dual-incretin agonists in metabolic research. Representative peer-reviewed reading:
- Jastreboff AM, et al. — SURMOUNT-1: tirzepatide once weekly in adults with obesity. [PubMed]
- Frías JP, et al. — SURPASS-2: tirzepatide versus semaglutide in type 2 diabetes. [PubMed]
- Coskun T, et al. — preclinical characterization of LY3298176 (tirzepatide) as a dual GIP/GLP-1 receptor agonist. [PubMed]
Tirzepatide (TIRZ) — Frequently Asked Questions
Where can I buy tirzepatide research peptide?
You can buy the tirzepatide research peptide directly from Dr Jays Peptides in vial sizes from 5mg to 120mg. Every batch is third-party tested and ships same-day from the US.
What is TIRZ?
TIRZ is the abbreviation for Tirzepatide, a dual GIP and GLP-1 receptor agonist peptide studied in metabolic and endocrinology research. Dr Jays Peptides supplies TIRZ as a lyophilized research peptide for laboratory use only.
Is TIRZ the same as Tirzepatide?
Yes. TIRZ is simply the short form of Tirzepatide used by researchers — it is the same dual-agonist research peptide.
Is TIRZ third-party tested?
Yes — every batch is third-party lab tested for purity and identity before release.
What other GLP-1 research peptides does Dr Jays Peptides offer?
Researchers studying TIRZ often also work with Cagrilintide (CAGRI), Semaglutide (SEMA), Retatrutide (RETA), and other compounds in our obesity research collection.
Nothing on this page is medical advice or a dosing recommendation.
Related Research Compounds
Tirzepatide (TIRZ) is commonly compared against other incretin and metabolic research peptides. Explore related third-party tested lyophilized compounds:
- Buy Retatrutide (RETA) — triple GIP/GLP-1/glucagon receptor agonist.
- Semaglutide (SEMA) — GLP-1 receptor agonist research peptide.
- Cagrilintide peptide (CAGRI) — long-acting amylin analog research compound.
- Cagrilintide + Semaglutide blend — dual-peptide metabolic research combination.
Tirzepatide — Further Research Reading
Background methodology and comparative data from our research library:
Further reading
Prefer a prefilled format? Tirzepatide is also available as a 3cc prefilled tirzepatide pen cartridge for the V3 auto-injection pen — no reconstitution required.
Prefer a pen? Skip reconstitution with the prefilled Tirzepatide 40mg Auto-Injection Pen — now on pre-order.
Reconstitution Chart (2 mL)
Mixing reagent: Bacteriostatic water. Add 2 mL to the vial.
| Vial size | Concentration | Per 1 unit (100-unit syringe) | Per 10 units |
|---|---|---|---|
| 120 mg | 60 mg/mL | 600 mcg | 6000 mcg |
Chart shows mixing math only.
For research use only.
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