Fat transfer to the butt is a popular and effective plastic surgery procedure to enhance the booty. More popularly known as the Brazilian butt lift, fat transfer surgery involves extraction of the excess fat from different areas of the body and careful grafting of the fat in the buttocks. One of the common questions I get to hear from prospective fat transfer candidates is how weight loss would affect the results of the fat transfer procedure. Well, this question is very important. You must be sure to discuss it with the plastic surgeon during the consultation session. After the fat is grafted into the buttocks, your body will vascularize the fat cells within 2-3 weeks. Vascularization means your body establishes blood circulation to the fat. After the blood starts to flow to the fat grafts, the outcomes of the intervention would gradually evolve and your butt would appear aesthetically appealing. However, after vascularization, the fat in your butt would behave in the same way as the fat in other areas of your body. This means weight changes would affect the fat in your butt in the same way as it does the fat in other areas of the body. If you lose weight, your butt will shrink. On the other hand, if you gain weight, your butt would further increase in size. This is the reason why plastic surgeons always advise patients to keep their weight stable after fat transfer to the butt. You must stick to a balanced diet in order to maintain a stable weight after the intervention. If you lose weight, the achieved aesthetic improvements would disappear. Your butt would become flatter, smaller, or poorly contoured again. Though weight gain would increase your butt size, there is no guarantee the shape and size of the butt after weight gain would be satisfactory. You should follow the plastic surgeon’s instructions, eat healthy foods, and do physical activities to retain the results achieved via fat transfer. As long as your weight is stable after the surgery, the results will remain with you and you may not necessarily need touch-up fat injections in the future. If weight loss has already affected the results of the fat transfer procedure, you may consider putting on some weight. If that fails to help, you may need additional fat injections in your butt.