Heal Bite

By biting and consuming an Uzumaki's chakra, the said Uzumaki can heal the injuries of others as well as themselves. This ability has been shown to heal even life threatening injuries, and is capable of quickly re-energising those healed. However, this technique 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.

Trivia

 * Karin has many bite marks spread throughout her arms, chest, and neck, implicating that she has used this ability repeatedly in the past.