Chronic traumatic encephalopathy (CTE) goes far beyond the NFL. Everyday men and women worry they have the fatal disease, and they've turned to questionable brain products for help.
Without a cure for Alzheimer's and other forms of dementia, prevention is paramount. Habits that helped early humans thrive still make sense: a varied diet, exercise and an engaging social life.
Scientists have identified specialized brain cells that create two distinct kinds of thirst. Some cells respond to a need for water alone, while others produce a craving for water and salt.