A physical sign of Alzheimer's disease could appear on the body decades before the first signs of memory loss, according to new research

This suggests that a quarter of the UK population could be at risk of Alzheimer's, with one in four adults considered overweight or obese.

The physicians tied a specific type of body fat, known as visceral fat, to higher levels of abnormal proteins in the brain that are indicators of Alzheimer’s. Visceral fat builds up around and between internal organs and can increase the risk of serious health issues. It is different than subcutaneous fat, which is fat just below the skin.