Hearts

Hearts are the standard HP for most characters and can be found in various varieties. The player cannot have more Red Hearts than Red Heart containers, but certain heart pickups can circumvent that limit.

Trivia

 * There are unused graphics for Half Soul Hearts and Half Black Hearts that are never seen in-game.
 * Half Soul Hearts were eventually added to the game as an unlockable.
 * Booster Pack made Scared Hearts beat faster, making them slightly easier to spot. This was from this Steam Workshop mod by piber20.
 * Gold Hearts' appearance was changed in Booster Pack.
 * Most items that grant Black Hearts upon being picked up say "evil up" in their description.
 * Immortal Hearts were a heart type present in the original Antibirth mod, but were not added to Repentance.
 * Blended hearts were a feature in the Community remix mod for the original The Binding of Isaac.