There is not really a lower limit on age (minors must have parental consent), as it is your general health which is more important to having the surgery. I would say that a 18 year old is extremely malleable and responds very quickly to exercise regimens, while a 45 year old who has been working out for 10 years is far less likely to improve their physique with conventional measures. Best that you schedule a consultation with an American Board of Plastic Surgery board certified plastic surgeon who performs hundreds of BBLs and liposuctions each year with excellent results and favorable patient reviews.Kenneth Hughes, MD, Board Certified Plastic SurgeonLos Angeles, CA