retatrutide nejm 2023 obesity trial ly3437943 just had its biggest data year yet. In 2026, Eli Lilly's triple GLP-1/GIP/glucagon receptor agonist posted two major Phase 3 readouts: TRIUMPH-1 (obesity, 2,339 participants) showed a 28.3% average body weight Retatrutide Dosage: Week-by-Week Chart 2026

If you reconstitute a 30 mg vial with sterile water and plan to draw doses over several weeks, you are creating a contamination risk that increases with every injection

But theyre far from the only weight-loss medications being prescribed these days

However, some people find that its side effects are worse and may prefer a different medication

Each phase of the Retatrutide dosing chart has a purpose

Standard adult BMI categories: Underweight: 250 per month at starting doses

Why it matters on GLP-1s : Preserves muscle mass during rapid weight loss (up to 25-40% of lost weight can be lean mass without adequate protein) Highest satiety per calorie keeps you full longer Requires more energy to digest (higher thermic effect) Target : 1.2-1.6g of protein per kilogram of body weight daily