01Fat Targeting and Metabolic Regulation
Retatrutide is described as targeting fat loss three ways: appetite suppression (minimal until higher doses), a shift in substrate utilisation via metabolic signalling so the body preferentially burns fat for energy, and an increase in basal metabolic rate — the stated explanation for the resting heart rate rise of 5–7 beats per minute reported on it.
Cagrilintide is described as increasing the effect on appetite suppression, so that retatrutide can reduce appetite and food noise at a lower dose than tirzepatide or other GLP-1s would require. It is also credited with reducing glucose spikes and slowing gastric emptying. Used together, the protocol states, they assist overall weight loss at significantly smaller doses — and smaller doses mean fewer side effects.
| Compound | Dose | Frequency | Note |
|---|---|---|---|
| Retatrutide | 1 mg | Weekly | Starting dose |
| Cagrilintide | 0.5 mg | Weekly | Held fixed |
As specified
- Increase retatrutide by 0.5 mg every 4 weeks — but only if weight loss has plateaued for at least 2 weeks straight (4 weeks for women), and only if there are zero side effects.
The plateau gate and the zero-side-effects gate are the two most defensible instructions in the whole protocol — they are a lowest-effective-dose principle in practice. What is absent is any glycaemic, cardiac or pancreatic monitoring alongside a compound whose trials measured all three.