The Connection Between Sleep and Alzheimer's Disease

How you sleep seems to relate to your risk of getting Alzheimer's Disease

Dr. Chad McDonald, DO

9/6/20232 min read

man holding chin
man holding chin

Alzheimer's disease is a brain disease that gets worse over time. It causes memory loss, thinking problems, and eventually death. There is no cure for Alzheimer's disease, but there are treatments that can help to slow the progression of the disease.

Sleep is important for overall health and well-being. It is during sleep that the brain cleans out toxins and repairs itself. There is growing evidence that sleep is also important for protecting the brain against Alzheimer's disease.

Here are some of the latest and largest studies showing breakthroughs regarding the connections between sleep and Alzheimer's disease:

  • A study published in the journal Nature Medicine in May 2023 found that people with Alzheimer's disease get less deep sleep than people without the disease. The study also found that people with Alzheimer's disease who get more deep sleep have less amyloid plaques in their brains. Amyloid plaques are one of the hallmark features of Alzheimer's disease.

  • A study published in the journal Science Translational Medicine in March 2023 found that sleep deprivation can increase the production of amyloid plaques in the brains of mice. The study also found that sleep deprivation can make amyloid plaques more toxic to brain cells.

  • A study published in the journal Alzheimer's & Dementia in February 2023 found that people with Alzheimer's disease who have more sleep disturbances are more likely to have cognitive decline over time. The study also found that sleep disturbances are associated with increased levels of tau protein in the brains of people with Alzheimer's disease. Tau protein is another hallmark feature of Alzheimer's disease.

These studies suggest that sleep is important for protecting the brain against Alzheimer's disease. Getting enough sleep, especially deep sleep, may help to reduce the risk of developing Alzheimer's disease and slow the progression of the disease in people who already have it.

Here are some tips for getting a good night's sleep:

  • Go to bed and wake up at the same time each day, even on weekends.

  • Create a relaxing bedtime routine.

  • Avoid caffeine and alcohol before bed.

  • Make sure your bedroom is dark, quiet, and cool.

  • Exercise regularly, but not too close to bedtime.

  • See a doctor if you have trouble sleeping.

If you are concerned about your risk of developing Alzheimer's disease, talk to your doctor. There are things you can do to reduce your risk, such as getting enough sleep, eating a healthy diet, and exercising regularly.