User blog comment:RaijinRising/Ozpin and the Color Naming Rule/@comment-27087951-20151110023852

....You discovered water....and named it fire.

The real reason Ozpin looks young yet is 80 years old: Too much badassery. Literally. Aura improves the body's natural recovery. His Aura is so strong, it even stops the body's natural decay.

In case you don't know: The body grows like normal, getting better in general, until one reaches a certain age, usually around 21. After that point, the body starts to decay. It gets weaker and weaker, at first at such a diminute extent it's almost unnoticeable, but becomes more noticeable at the late 20s and up.