Mitocondrial damage in BD patients. BD patients have altered response to stress and frequently they have a story of life stress events. Also, there are alterations in sleep, mainly reduced sleep at night in BD patients. Stress and poor sleep can induce mitochondrial damage and induce temperature alterations as well as increase inflammation and oxidative stress (level of ROS), temperature has been reported to be increased in BD patients, and high temperature can induce mitochondrial damage. BD patients also have shown to be in a chronic inflammatory state; which; can induce mitochondrial damage, an increased temperature and oxidative stress. ROS are elevated in BD patients and this elevated ROS can worsen the inflammatory state and stress outcome, oxidative stress, and also damage mitochondria. Damaged mitochondria in BD patients have an altered morphology, reduced respiration rates, polymorphisms and deletions in DNA. In consequence of their altered function BD patients have reduced high energy phosphates levels and reduced pH, and their altered mitochondrial function, can in turn increase oxidative stress, neuro-inflammation, and have an impact in stress response. Lipid composition of mithochondrial membrane affect the organelle response to stress, in particular, high levels of PUFAs are protective against different types of stress involved in pathophysiology of BD.