It's not clear exactly how dementia gets started or might be stopped, but we do know that there are many different risk factors for the condition, ranging from hearing impairments to breathing polluted air.

It's not clear exactly how dementia gets started or might be stopped, but we do know that there are many different risk factors for the condition, ranging from hearing impairments…

A study involving 12,000 adults in the US suggests that taking action to prevent dementia during your 50s can make a big difference later in life