Brain The brain consumes 20% of the oxygen that enters our body, which is the body where ! as many free radicals are produced, leading to increased oxidative stress.! Oxidative stress is the increase of free radicals and antioxidants in reducing organism. ! Antioxidants are essential in our body that help us fight the attack of free radicals, which ! are responsible for stealing electrons from complete molecules, which eventually ! becomes involved in diseases in our body, such as Alzheimer's.! This oxidative stress is associated with Alzheimer's, one of the most common diseases ! generated by the deterioration of neurons that trigger dementia. His initial symptom is ! early memory deficits and subsequent disruption of language, all this is caused by the ! lack of antioxidants in our body.! ! ! 5. Cognitive impairment - the patient forgets everything learned throughout his life.! ! ! How do antioxidants play a role in reducing the risk of developing Alzheimer’s?! ! ! ! ! ! ! ! ! ! ! ! Natural antioxidants are those found in the daily diet. They are found mostly in fruits and ! vegetables, but to reach the levels required by the WHO (World Health Organization), ! ! !  we must consume large amounts of fruits and vegetables.! To help you understand this easier, WHO says we should consume between 500 and ! 800 milligrams of antioxidants daily are between 6 and 7 servings of salad, which are ! very difficult to apply in our diet, because apart from this we consume other foods to our ! ! ! ! ! diet is really balanced.! !