45% of the world population does not get enough sleep. Scientific research is finding that poor sleep could be linked to Alzheimer’s. A recent study collected spinal fluid of 101 people with an average age of 63... who had a family history of Alzheimer's or carried a gene linked to the condition. Researchers found that sleep problems from disruption to daytime sleepiness... were all associated with increased spinal fluid indicators of Alzheimer’s disease. Barbara B. Bendlin, Ph.D.