Hunger

Hunger is a game-mechanic that will be added in a future update. Hunger introduces a new bar which degenerates over time, and needs to be replenished by eating food.

Importance
Hunger Bars are important, due to when the hunger bar is full, the player will slowly regenerate health- a feature currently only available in Peaceful mode. Also, hunger allows for sprinting- which is fast movement.

Controversy
Due to the controversy Hunger caused in Minecraft PC, the Minecraft PE team stated that they may or may not add hunger, but in the 21 Million Panel Livestream, it was stated Hunger will be implemented in a future update, but with a toggle switch.

Trivia

 * The update for Hunger is unknown.