Effect of Lifestyle Intervention on Mobilization of Fat Storage and Iron Deposition in Obesity

The goal of this clinical trial is to learn if calorie-restricted balanced diet could uniquely influence various fat storage pools and iron deposition and explore the relationships between fat or iron deposition loss in specific locations and glucose metabolism. The main questions it aims to answer are: After lifestyle intervention, which part of the body shows the fastest fat mobilization? Which part shows the slowest fat mobilization? Which area's fat mobilization is most related to the alleviation of glucose metabolism? Is there a relationship between the fat deposition in organs and the iron deposition in organs? Researchers will compare the liver fat, pancreatic fat, visceral fat, subscutaneous fat, liver and pancrease iron depositon after lifestyle intervention using self pre-and post-control . Participants will: Receive the lifestyle intervention in outpatient. Visit the clinic once after 6 months for checkups and tests. Keep a diary of their diet.