Men who lose Y chromosomes from their blood cells as they age may have an increased risk of developing Alzheimer's disease, a new study suggests.
The study of more than 3,200 men found those who already had Alzheimer's were nearly three times more likely to show a loss of the Y chromosome in some of their blood cells. What's more, older men with that "loss of Y" faced a higher risk of developing Alzheimer's over the next eight years.