Enhanced longevity

Enhanced longevity is the ability to age more slowly than average humans, giving oneself an extended lifespan.

Marvel

 * Daken (via Enhanced regeneration) was born in 1946 but retains the health, appearance, and vitality of a man in his prime.
 * Raven Darkholme (via Enhanced regeneration) is around 100 years old but has the appearance and vitality of a woman in her prime.