A Study to Evaluate the Effect of RO7204239 on Insulin Sensitivity and Muscle Composition in Participants With Type 2 Diabetes Mellitus (T2DM) and Overweight or Obesity

This study is testing whether a new drug called RO7204239 can improve how well the body responds to insulin and help preserve muscle in people with type 2 diabetes who are overweight or obese. It aims to address both blood sugar control and muscle loss, which often occur together. **You may be eligible if...** - You have had type 2 diabetes for at least 6 months - You are managing it with diet/exercise alone, metformin, or certain other oral diabetes medications at a stable dose - Your HbA1c (a measure of blood sugar control over time) is between 6.5% and 10% - Your BMI is between 27 and 45 - Your weight has been stable for the past 3 months **You may NOT be eligible if...** - You have type 1 diabetes or a history of diabetic ketoacidosis - You take insulin or other injectable diabetes medications - You have significant heart, kidney, or liver disease - You are pregnant or planning to become pregnant - You have a history of certain cancers or muscle disorders Talk to your doctor to see if this trial is right for you.