Donald Trump proudly sleeps four to five hours each night.
Ronald Reagan and Margaret Thatcher did the same. Both went on to develop Alzheimer’s Disease (p. 162).
Epidemiological studies have confirmed the link between Alzheimer’s Disease and inadequate sleep across a lifespan. Toxic proteins and stress molecules build up in the brain throughout the day, and are removed at night when we sleep. The less we sleep each night the more these molecules accumulate, and the more likely we are to develop dementia (p. 161).
Inadequate sleep is only one risk factor for developing the disease, but I’m not taking any chances.