The number of fat cells in adults is fixed, and being fat and thin only increases or decreases the triglycerides in them. . . Therefore, both fat loss and fat gain are systemic, and the distribution of fat cells in each person is different, which also leads to the different positions of fat accumulation and reduction. . . Some people have a lot of fat cells in their waist, and the amount of triglycerides accumulated in each fat cell is the same. Naturally, the belly is bigger first, and the rest are legs. . .