Sleep Doesn't Have to Get Worse With Age | Dr. Rebecca Robbins

Dr. Rebecca Robbins, a Harvard sleep scientist, unpacks how and why sleep changes after age 38–40, and what you can do about it. She details the brain’s overnight wash cycle that clears Alzheimer’s-linked toxins, the findings from her eight-year study linking poor sleep to dementia risk, and why jumping your bedtime back an hour almost always backfires. The conversation also covers a simple at-home test for sleep quality and the surprising relationship benefits of a 'sleep marriage' — sleeping separately on purpose.