Carl read the papersWhat it actually is
Tirzepatide activates two gut-hormone receptors at once — GIP and GLP-1 — which together drive stronger appetite suppression and glucose control than single-agonists.
It’s FDA-approved as Mounjaro (diabetes) and Zepbound (weight management), backed by the SURMOUNT and SURPASS trial programs.
How it’s thought to work
- Dual agonism — stimulates GIP and GLP-1 receptors simultaneously.
- Appetite + satiety — stronger reduction in hunger than GLP-1 alone in trials.
- Glucose handling — improves insulin sensitivity and post-meal glucose.
- Weekly kinetics — long half-life supports once-weekly dosing.
What the research says
Head-to-head trials show greater average weight loss than semaglutide (up to ~20%+). Strong, recent human evidence.
- Largest average weight loss of the approved GLP-class.
- Type-2 diabetes control.
- Cardiometabolic benefits under active study.
Reported protocols
These are the doses the peptide community actually reports running (Reddit & forums), alongside published research — logged for education, not as a recommendation to use.
| Parameter | Commonly reported range |
|---|---|
| Community dose | 0.25–1.5 mg microdose; ladder 2.5→5→7.5→10→12.5→15 mg |
| Frequency | Once weekly (some split 2× / week) |
| Route | Subcutaneous |
| Titration | Extend each step to 8–12 weeks, not 4 |
| Community tip | Sit at the lowest dose that controls appetite; microdosing needs compounded vials |
Common use cases
| Goal | Community protocol notes |
|---|---|
| Weight loss | 2.5 → 15 mg/wk, slow titration |
| Type-2 diabetes | Mounjaro, weekly |
| Microdose start | 0.25–1.5 mg/wk compounded |
Mixing it (reconstitution)
Freeze-dried peptides must be reconstituted with bacteriostatic water before they can be measured. Carl’s calculator turns “mg in the vial + ml of water + target dose” into “units on the syringe” — and tells you how long the vial lasts.
→ Open the Reconstitution Calculator
Injection & handling
SubQ once weekly (rotate sites); some split into two smaller weekly shots to flatten peaks. Titrate slowly, holding each step 8–12 weeks. Microdosing needs compounded vials (pens can’t dispense below 2.5 mg). Store per label.
Stacks it appears in
- Foundation — Tirzepatide alone is usually the base — extras are for side-effect support, not stacking for effect.
