Seniors' risk of dementia is more than double what was previously thought. The risk of developing dementia after age 55 is more than 42% among Americans, researchers reported in a study published Monday in the journal Nature Medicine.

New research suggests that the risk for developing dementia is significantly higher than previously estimated, and the burden on the United States population will grow substantially over the next few decades.

A groundbreaking study reveals that Americans over 55 now face a 42% risk of developing dementia, significantly higher than previous estimates. With cases expected to double by 2060, this poses major challenges and calls for urgent action in public health policies.