If it's obesity, it means a body mass index (BMI) greater than 28. In terms of dietary restrictions for obesity, the general principles are low salt and low fat. First and foremost, intake of fats should be limited, including both the cooking oils and foods consumed. Preference should be given to vegetable oils, and consumption of animal fats should be minimized. Even with vegetable oils, there is a limit to how much should be used, as excessive amounts can also exceed health standards. Furthermore, one should eat less fast food and junk food, such as various fried foods or those containing excessive seasonings, and these foods should be consumed minimally. There are also "invisible" fats to consider, such as those found in nut snacks and various small packaged snacks like peanuts and fried beans, which are very high in calories and should be consumed less. Additionally, sugary drinks like iced tea and pear syrup drinks should be avoided. The overall principle is a low-calorie diet, avoiding high-calorie foods.