A simple blood test may be able to detect a "toxic" protein many years before a person starts to display symptoms of Alzheimer's.
Researchers at the University of Washington (UW) have developed a test that can spot the dangerous clumps of protein, called amyloid beta, long before symptoms such as memory loss show up.
At the moment, people tend to get diagnosed with Alzheimer's after they start to develop symptoms. But by that point, the best treatment option is only to slow down the progression of the disease, rather than prevent it.
