Healing Rate
Healing_Rate Affects the rate at which you naturally regenerate Hit Points , as well as how quickly you recover HP when using the First Aid skill or healing drugs . A character's healing rate is affected by their Endurance , the Fast Metabolism and Night Person traits, and the Faster Healing perk.
Starting healing rate is determined by the formula: (ST / 3) + (EN / 2) , both values rounded down.