Retatrutide goes a different route by acting on three hormones that regulate appetite and metabolism
M., Richardson, M., Phillips, M., Raymond, F., & Rind, D
Protocol 2: significant weight loss (20-25% body weight) Goal: Substantial weight reduction for health improvement Tirzepatide approach: Full escalation to 10-15 mg Expect to reach target dose by week 17-21 Weight loss at 15 mg: approximately 22.5% at 72 weeks Plateau typically occurs around weeks 60-72 Retatrutide approach: Full escalation to 8-12 mg Expect to reach target dose by week 13-17 Weight loss at 12 mg: 24.2% at 48 weeks, 28.7% at 68 weeks No plateau observed in trial data at 48 or 68 weeks For significant weight loss goals, retatrutide reaches 20%+ body weight reduction faster and ultimately achieves a higher ceiling
Abstract A large body of evidence suggests that the regulation of energy balance and glucose homeostasis by fermentable carbohydrates induces specific changes in the gut microbiota
The doses studied in clinical trials range from 1mg to 12mg, with 12mg being the highest dose tested and producing the greatest weight loss (-24.2% at 48 weeks in Phase 2, -28.7% at 68 weeks in Phase 3)
This suggests that the effect involves inhibition of sodium-hydrogen antiporter (NHE3) (33)