A blood protein can flag dementia risk decades before symptoms appear

Forgetting the name of a loved one may be one of the first signs people notice of dementia, but it's rarely the first warning sign your brain gives.

Changes in the brain that lead to neurodegenerative diseases like Alzheimer's and dementia start showing up decades before symptoms arrive, and the chemicals at work inside the body can often tip us off to these changes well ahead of time. ...