Research shows that many illnesses connected with aging can be avoided or slowed down through optimal cell health. Studies show that oxygen levels in arterial blood in a 70 year old are 20% lower than in a 30-50 year old. Chronic lack of oxygen can cause progressive nerve cell death. Adding extra oxygen fights chronic conditions, especially inflammation and is very important in improving brain circulation and brain activity. On a longer scale hyperbaric oxygen therapy provides neuroprotection by stimulating oxidative cerebral energy metabolism.