Blood Test Could Detect Alzheimer's As Many As 16 Years Before Symptoms

A new study says there's a blood test may be able to detect Alzheimer's as many as 16 years before symptoms even arise.  

Researchers say measuring changes in the levels of a protein in human blood called neurofilament light chain can tell whether a person will get the disease.  

They believe that any rise in NFL levels can be an early sign of future brain damage.  It's estimated that 44 million people worldwide have Alzheimer's or some form of dementia.


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