Saw a documentary about him and his lifestyle. Guy is constantly surrounded by those whose soul job is to make sure he is in the best health. From the healthiest food, a bountiful supply of vitamins and even IV administered vitamins, to skin care routines and a doctor traveling with him at all times. I guess if you have good genetics and enough money to afford specialists and the best of everything you are set to keep yourself looking young. Plus he is an avid exercise junkie and does most his own stunts.
Same documentary showed that Dwayne Johnson has a semi follow him everywhere to offload his own personal gym to get a workout in every day.
Money makes staying young and healthy easier for sure.