In an interesting and enlightening study, finding the fountain of youth of the twentieth century, evidence was found to stop the aging process and regenerate brain cells in mice. In the experiment, mice young and old were taken with their circulatory systems connected. The young blood flowed through the body and brain of the adult mouse and as a result, the brain cells were renewed , the memory returned to him and his cognitive abilities radically improved. To the question of the possibility of stopping aging disease and prolonging life in humans, the study answers at the beginning of experiments with Alzheimer's patients who received blood from young volunteers, observing over time the changes that their brains undergo and checking for changes in their cognitive abilities.