You can heal damage faster than normal.
Benefit: Once per day, you can gain fast healing 1, +1 for every five character levels you possess (maximum fast healing 5 at 20th level). This effect lasts for 1 minute.
You can activate this feat as an immediate action or, if you have a daily use available, it automatically activates if you are reduced to 0 hit points or below (but not killed).
Special: As a full-round action, you can transfer this ability to a willing recipient as a touch spell. Doing so counts as one daily use of the ability.
Special: You can select this feat multiple times, gaining one additional daily use each time you take it.
Special: If you have the ability to turn or rebuke undead, you gain one additional daily use of this feat for each daily turn or rebuke use you expend.
Source: Complete Champion, page 59.