The Fountain of Youth is a mythical fountain with mystical rejuvenating properties, which has the prophesized ability to restore a being's body to its prime, or at the very least, prevent them from fatalities such as death.
The Fountain appears to be capable of maintaining one's fighting skills and reflexes to a certain degree, as it somewhat allowed Master Roshi to keep the youthful abilities he possessed at his prime (though it should be noted that even with the Fountain's effects, Roshi still experiences the limits of someone his age). It was first mentioned by Turtle, who argued against Master Roshi by stating that he had used the Fountain of Youth and therefore was not as old as he had informed Goku; this was after Roshi had requested to see Bulma's breasts in exchange for the Bansho Fan.
- The Fountain of Youth originated from mythical tales in folklore, such as Greek and European accounts and theories.
- Enemies such as King Piccolo, Garlic Jr., Vegeta, Lord Slug and Frieza have struggled to claim eternal youth and life in the past. Ironically, the Fountain of Youth may have proved accessible to them, but none have ever attempted to use its powers. It is more than plausible that they did not consider its existence, or simply wished for more long term effects.
- In several manga translations, it is stated that Master Roshi drank the "Immortality Elixir", which may indicate that the Elixir was formulated from ingredients and chemical compounds gathered from the Fountain of Youth. Otherwise, the Elixir may be an entirely different term than the Fountain. Another possibility is that the Fountain of Youth is a term limited only to the FUNimation Dub, as FUNimation makes numerous alterations from the Japanese version.