From this cascade comes a prediction: getting too little sleep across the adult life span will significantly raise your risk of developing Alzheimers disease. Precisely this relationship has now been reported in numerous epidemiological studies, including those individuals suffering from sleep disorders such as insomnia and sleep apnea.VIII Parenthetically, and unscientifically, I have always found it curious that Margaret Thatcher and Ronald Reagantwo heads of state that were very vocal, if not proud, about sleeping only four to five hours a nightboth went on to develop the ruthless disease. The current US president, Donald Trumpalso a vociferous proclaimer of sleeping just a few hours each nightmay want to take note.

Why We Sleep by Matthew Walker