The genetically engineered blood of Khan Noonien Singh in the Kelvin timeline, whose regenerative properties cured a dying child and, made into a serum by McCoy, revived James Kirk.
In the film Star Trek Into Darkness the blood of the 20th-century augment Khan Noonien Singh is shown to regenerate damaged tissue with extraordinary speed.
Khan, living under the name John Harrison, first uses it as a bribe. He offers the Starfleet officer Thomas Harewood a transfusion that cures Harewood's terminally ill daughter in a London hospital, and in exchange Harewood destroys the Section 31 installation hidden beneath the Kelvin Memorial Archive. Later, with Khan a prisoner aboard the Enterprise, Doctor McCoy injects a sample of his platelets into a dead tribble.
That experiment pays off at the end of the film. Kirk dies of radiation poisoning after realigning the warp core, and at that moment the tribble stirs back to life. McCoy has Kirk placed in a cryogenic tube, Spock and Uhura capture Khan alive, and a serum made from his blood restores the captain two weeks later.