// 0xC6258F41D86676E0
void SET_PED_CORE_LEVEL(Ped ped, int coreType, int coreAmount)
/*
    coreType = 0 (health), 1 (stamina), 2 (deadeye)
    coreAmount = range between 0 (empty) and 100 (full)
*/

Citizen.InvokeNative(0xC6258F41D86676E0, PlayerPedId(), coreType, coreAmount)
Citizen.InvokeNative(0xC6258F41D86676E0, PlayerPedId(), 0, 50) // Sets health to half