The best way to remain beautiful your whole life is being born in a family of (white) millionaires, remain a millionaire through inheritance and by working on your family’s cushy business without ever having to worry about nothing for not even a second of your life and also having access and being able to aford the most modern and technological advancements in beauty. If that is not enough and you still feel time is getting close you can create your own fake science and get even more money (maybe that helps?)