Through biting and consuming the user's chakra, the user can heal the injuries of others, as well as themselves.
This ability has been shown to heal even life threatening injuries, and is also capable of quickly restoring the stamina those healed. This technique, however, rapidly depletes the user's own chakra reserves, and is left with a permanent bite mark every time one uses it. Due to its depletion of chakra, it is dangerous for one to use this ability too regularly as Karin normally refrains from doing so more than once a day.
Two members of the Uzumaki Clan have demonstrated this ability: Karin and her mother. It is unknown if this is a trademark ability of the clan or is unique to Karin's family.