Dementia with Lewy Bodies (DLB) is a progressive type of dementia that affects over 1 million people in the United States. DLB is characterized buildup of abnormal protein clusters (known as Lewy Bodies) in the brain. People with DLB have fluctuations in cognition, particularly in alertness and attention. Many people with DLB can have visual hallucinations and REM sleep disturbance. Currently, there are no approved treatments for Lewy body dementia in the United States or Europe.