Patrick McKeown

Dr. Joseph Mercola
It has been well documented that those who live at higher altitudes tend to live longer. The precise mechanism behind this is not known and could be a result of several factors. However, one of the leading candidates for this explanation is a reduced pressure of oxygen at higher altitudes.
Research is very clear that calorie restriction extends life span. But another nutrient many of us don’t frequently consider is oxygen. Just as excess calories can cause metabolic damage, excess oxygen can also prematurely damage your tissues through the generation of excess free radicals. These are highly reactive and destructive molecules that cause damage to the fats in your cell membranes, proteins, and DNA. Free radicals are generated by the normal breakdown of oxygen