The “peach buttocks” is a buttock with a rounded curve like a peach shape, and slightly upturned with white and red skin, which is considered one of the signs of female health and beauty. Autologous fat transplantation can improve the shape of the buttocks quickly and significantly. Fat filler in the buttocks not only increases the circumference of the buttocks, but by adjusting the fat distribution in the buttocks, it can make the surface of the buttocks flatter and the curve smoother, and also create a slightly upturned shape. On the other hand, fat grafting also has a rejuvenating effect on the skin, restoring elasticity and rejuvenating the skin tone of the buttocks. After the results of surgical grafting and filling are stabilized, the results of the surgery can be long lasting as long as the weight remains the same. This is closely related to maintaining good lifestyle habits and moderate exercise after surgery to avoid large fluctuations in weight and body fat percentage. Some people will worry that the increased volume and weight of the buttocks after fat grafting will cause the buttocks to sag under the influence of gravity. In fact, quite the contrary, fat grafting can create a slightly curved buttock shape. Whether the buttocks will sag or not is influenced by many factors, such as age, nutritional status, and exercise habits. Even without fat filler surgery, most people’s buttocks will gradually become saggy and loose as they age. There have been no reports of buttock fat grafting being a factor in making the buttocks more susceptible to sagging. Therefore, there is no need to be overly stressed about this issue.