Tirzepatide is a synthetic 39-amino-acid research peptide engineered as a first-in-class dual agonist — engaging both the glucose-dependent insulinotropic polypeptide (GIP) receptor and the GLP-1 receptor within a single molecule. Its C20 fatty-diacid side chain provides reversible albumin binding for an extended plasma half-life in preclinical models. As with other long-chain modified incretin research peptides, Tirzepatide is highly hydrophobic and requires an acidic solubilization diluent.

ProSource Labs supplies Tirzepatide in the following available vial sizes: 10mg, 20mg. Each Tirzepatide vial contains pure lyophilized peptide — no fillers, no bulking agents. Product SKU references: TIR-10MV, TIR-20MV.

• Peptide class: 39-amino-acid dual GIP / GLP-1 receptor agonist with C20 fatty-diacid side chain
• Residue count: 39 amino acids
• Molecular weight: ~4,813 Da
• First-in-class dual agonist: GIPR + GLP-1R
• 39 amino acids; MW ~4,813 Da; C20 fatty-diacid side chain
• Reported to have GIP-receptor bias at physiologically relevant concentrations
• Requires dilute acetic acid for solubilization

Batches are characterized by ESI mass spectrometry to confirm molecular weight against the theoretical value, with amino-acid sequence confirmation on selected QA lots. Peptide content assay distinguishes net peptide mass from residual counter-ion salt.

Lyophilized Tirzepatide vials should be stored at -20°C (or colder) in a laboratory freezer, inside the sealed factory container. Minimize warm-up cycles — move only the specific vial needed for a given experiment out of frozen storage at a time.

All laboratory handling of Tirzepatide should follow the receiving institution's SOPs and applicable peer-reviewed protocols relevant to the researcher's specific experimental question. ProSource Labs does not publish end-user preparation or usage instructions.

Every batch of Tirzepatide released by ProSource Labs undergoes independent reverse-phase High Performance Liquid Chromatography (HPLC) — the industry-standard analytical method for this class of research compound. Target chromatographic purity is typically ≥ 99%.

Additional characterization may include ESI mass spectrometry for molecular weight confirmation, Karl Fischer titration for residual moisture, and appearance/solubility inspection. A batch-specific Certificate of Analysis (COA) is available on request through customer support after purchase.

Each production lot of Tirzepatide is quarantined pending analytical release, tested against documented purity, identity, and moisture acceptance criteria, and only released to sellable inventory after passing every QA checkpoint. Batches that fail any single criterion are quarantined and never reach customer-facing inventory.

If a vial of Tirzepatide you received from ProSource Labs ever fails your own institution's incoming QA testing, contact customer support at support@prosourcelabs.org — we retain samples of every batch for cross-verification.

Tirzepatide is used in preclinical research on dual-incretin receptor pharmacology. Published preclinical literature has examined Tirzepatide's effects on glucose homeostasis, body composition, hepatic steatosis, and food-intake regulation in rodent obesity and diabetes models. Because it engages GIP and GLP-1 receptors simultaneously — with a reported bias toward the GIP receptor at physiologically relevant concentrations — Tirzepatide is used for research questions where dual-receptor engagement is the intended experimental variable, distinct from single-agonist Semaglutide and triple-agonist Retatrutide reference compounds.

Tirzepatide vials ship in tamper-evident, moisture-resistant, cold-chain-friendly outer packaging from our Southern California distribution facility for fast US domestic delivery — typically 2-4 business days coast-to-coast, with expedited options available at checkout.

Every Tirzepatide shipment is discreet — the outer packaging carries no product-specific branding or direct reference to the compound name inside, protecting researcher privacy. Tracking numbers are emailed automatically. For institutional or high-volume orders, dedicated wholesale pricing is available through the wholesale portal.