The true beauty of a Brazilian Butt Lift is that it uses your own body fat, so there is no risk of allergic reaction to foreign materials, and the result is smooth and natural. The results can last 20 years or more because Dr. Griffin is an expert at properly harvesting and transplanting the fat in an aesthetically pleasing manner. Inevitably, some of the fat cells will be absorbed back into the body and some will stay where it was injected. Staying fit and slim can help keep your BBF looking terrific. However, as we age, it is normal that your buttocks will change.