Change of Adipose Tissues and Triglyceride After Bariatric Surgery or Life-style Intervention

This study is looking at how fat tissue stored in and around the liver and organs changes after weight-loss surgery versus structured lifestyle changes (diet and exercise). Researchers want to understand which approach more effectively reduces the metabolic harm caused by excess body fat, especially triglycerides and liver fat. **You may be eligible if...** - You are overweight or obese — BMI of 25–30 with metabolic syndrome, BMI over 30 generally, or BMI over 35 for severe obesity - You are planning to have weight-loss surgery or participate in a structured lifestyle program **You may NOT be eligible if...** - You have liver diseases unrelated to weight (such as hepatitis) - You are taking medications known to affect liver fat - Your waist circumference is 150 cm or more - Your weight is 250 kg or more - You have a reason you cannot have an MRI scan such as metal implants Talk to your doctor to see if this trial is right for you.