The lifetime risk of developing dementia after age 55 is significantly higher than previously thought, reaching 42% overall and even higher in certain populations like women and Black adults.

Modifiable health factors like hypertension, diabetes, lack of exercise, poor sleep, and hearing loss contribute significantly to the increased risk, highlighting the importance of preventative measures.

The aging US population is a major driver of the projected increase in dementia cases, with an estimated 1 million new cases annually by 2060.

While there are some advancements in drug treatments for dementia, they often come with high costs and significant side effects.

The findings emphasize the urgency for public health strategies to promote healthy aging and mitigate dementia risk across diverse populations.