Lifespan

Lifespan is a setting in the options menu of The Sims 3 that determines how long a Sim's natural life will be. As always, the Sim may die a premature, unnatural death, regardless of this setting.

The player can lengthen a Sim's lifespan in game without altering game settings by having them eat a Life Fruit (restores one day) or Ambrosia (resets days to age up), earning the Marathon Runner athletic skill challenge, being a Vegetarian or becoming creature like a mummy or a vampire, who live a number of days longer than a normal Sim.
 * Short: 25 Sim days
 * Medium: 50 Sim days
 * Normal: 90 Sim days
 * Long: 190 Sim days
 * Epic: 960 Sim days

Aging can also be turned off in the options menu to temporarily or permanently stop every Sim in town from aging.