Cell Activation Technique

Tsunade was studying and trying to develop a technique that could stimulate simultaneously all the cells in a human body, task that demonstrated being hard even for her, the implication that there are delicate parts like organs between those cells that become a major obstacle to complete the technique.

Trivia

 * When Rock Lee appeared almost recovered into th battle against Kimimaro, didn't got clear if his recover was the result of this technique.