1. All adults lose weight when their daily calorie intake is below 1000 calories. Therefore, individuals with metabolic resistance to weight loss will lose weight if they can follow a diet of 800- 1200 calories per day. Of course, stricter calorie control may make them lose weight faster.

2. The root cause of obesity is that energy intake is greater than energy consumption, and the fundamental way to lose weight is to make energy intake less than energy consumption. In addition to strict diet control and balanced nutrition, strengthening exercise can make people lose weight faster. The key to losing weight is healthy lifestyle, including reasonable diet, moderate exercise, smoking cessation and alcohol restriction, and maintaining psychological balance. When adults consume less than 1000 calories a day, they will lose weight.