Select Strength — 15mg
For in vitro laboratory research use only. Not for human consumption, diagnostic, or therapeutic use.
Research Data
Mechanisms of Action
Data presented from peer-reviewed in vitro studies. All findings are laboratory observations only.
Jastreboff et al. published SURMOUNT-1 in NEJM 2022, demonstrating tirzepatide 15mg achieved 22.5% mean body weight reduction at 72 weeks — the greatest weight loss ever demonstrated in a Phase III pharmaceutical trial. FDA approved Zepbound (tirzepatide) for obesity in November 2023.
Tirzepatide (Mounjaro/Zepbound) is the first dual GIP/GLP-1 receptor agonist approved for both type 2 diabetes and obesity. SURMOUNT-1 Phase III trial demonstrated 22.5% mean body weight reduction at 72 weeks — the greatest weight loss ever demonstrated in a Phase III pharmaceutical trial at time of publication.
Analytical Data
| Specification | Value |
|---|---|
| CAS Number | 2023788-19-2 |
| Molecular Formula | C₂₂₅H₃₄₈N₄₈O₆₈ |
| Molecular Weight | 4813.47 g/mol |
| Purity (HPLC) | 99.1% |
| Appearance | White lyophilised powder |
| Solubility | Soluble in water (1 mg/mL) |
| Storage | −20°C long-term / 2–8°C short-term |
| Shelf Life | 24 months from production date |
| Research Grade | Yes — For In Vitro Use Only |
What Research Has Shown
Phase III SURMOUNT-1 Trial — NEJM, 2022
Mean Body Weight Reduction at 72 Weeks (15mg dose, SURMOUNT-1)
Comparative Activity Profile
In Vitro Safety Data
Tirzepatide carries the full Phase III safety dataset from SURMOUNT-1/2/3/4 and SURPASS trials (combined N>10,000). GI adverse events are the primary tolerability concern, consistent with the GLP-1 mechanism component. The GIP component appears to mitigate nausea severity vs. GLP-1 monotherapy.
Observed Adverse Indicators
Nausea (any grade)
moderateDiarrhoea
lowVomiting
moderateSerious adverse events
lowDiscontinuation due to AEs
low⚠️ Theoretical Concern
Tirzepatide (Mounjaro/Zepbound) holds full FDA approval for T2D and obesity with an established Phase III safety database. All in vitro observations must remain within laboratory research parameters.
Researcher Reference
GIP receptor agonism complements GLP-1 through distinct mechanisms: GIP directly acts on adipose tissue to modulate fat cell signalling and insulin sensitivity, amplifies pancreatic insulin secretion synergistically with GLP-1, and appears to reduce nausea side effects. The net result is superior weight loss vs. GLP-1 alone as shown in head-to-head SURPASS-2 data.
SURPASS-2 head-to-head Phase III trial: Tirzepatide 15mg achieved −11.2kg vs. semaglutide 1mg at 40 weeks. Weight loss trials (SURMOUNT vs. STEP) show 22.5% vs. 14.9% — approximately 50% greater weight reduction. FDA-approved for both T2D and obesity.
Lyophilised: −20°C up to 24 months. Reconstituted: 4°C, use within 28 days. Do not freeze reconstituted solution.
Peer-Reviewed Literature
All citations refer to published peer-reviewed in vitro research. Data presented for scientific reference only. No claims made regarding human therapeutic use.
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