Regenerate is an ability associated with the Constitution skill. It cannot be used in combat. When activated, Regenerate rapidly drains the user's remaining adrenaline over a period of up to 6 seconds, healing the user for up to 25% of their maximum life points. The amount of life points regained is directly proportional to the amount of adrenaline drained; for example, if Regenerate drains 50% adrenaline, the user will be healed by about 12.5% of their maximum life points.
Periodic use of this ability allows players to complete some Slayer assignments, and other related monster-killing activities, with little or no food. However, Regenerate generally does not provide enough healing potential to solely recover damage taken during player killing activities, or while fighting bosses. However, it may still be used as a supplementary healing source.
Trivia
Regenerate is the only ability that cannot be used in combat.
If a player activates Regenerate and enters combat before its effects are completed, it will turn itself off. Adrenaline would stay at where it was before it is interrupted.