An international collaboration found that physical and social exposures, like levels of democracy and air pollution, can accelerate cognitive decline.

Peter Murphy Lewis writes about how he combined caregiving with his passion for storytelling, later gaining recognition as a keynote speaker and documentary filmmaker.

In a new study, lonelier older adults performed worse on memory tests, but their performance didn’t decline any faster than people who were less lonely.

From fish oil to turmeric, brain health supplements make bold claims. Here’s what researchers say about the evidence — and why diet may matter more.

Dr. Maya Koronyo-Hamaoui explains how Chlamydia pneumoniae, a common respiratory bacterium found in the eye, may be tied to inflammation and dementia.