Cannibal (Fallout 3)

Cannibal, called Mystic Power in the Japanese PS3 version, is a perk $$

Effects
The perk has one rank and requires the Lone Wanderer to be level 12 or above. It allows them to feed on the corpses of both humans and non-feral ghouls.

Each corpse feasted on restores 25 HP, adds three Rads and reduces Karma by one point. If the act is witnessed by friendly non-player characters, they will turn hostile. However, companions will not turn hostile.