Hello, and thank you for your question. The sort answer is, age is just a number. In general, surgical clearances are based off of health history moreso than age. Please visit a board-certified plastic surgeon -- depending on the type of buttocks augmentation you wish to pursue, the time under anesthesia associated with that procedure, and your own personal and family medical history, your plastic surgeon will ask you to get certain pre-operative clearances from other physicians. For healthy individuals within a normal weight range for their height and age, this poses no problem and they can typically get all clearances from a primary care physician. However, if you have a significant history, such as a prior or current history of diabetes, heart problems, or blood clots (DVT/PE/VTE), the pre-operative clearance process becomes more intensive, but not insurmountable by any means (you may need to be checked out by one or two more physicians prior to getting cleared for surgery). These clearances serve as a mechanism to check that the procedure and anesthesia associated with that procedure is as safe as possible for you as a patient. If you have a complex or significant medical history, are on medication, or have a significant family history, it is important to disclose these risk factors to your plastic surgeon so that they can make sure you are appropriately cleared with surgery. Additionally, it is always very important to follow your physician's pre and post-operative instructions to make sure your procedure and recovery go as smoothly as possible. I hope this helps you!