US Alzheimer's Association panel proposes diagnosing asymptomatic middle-aged adults with Alzheimer's based on new blood tests.

A US-based Alzheimer's Association panel has proposed controversial plans to diagnose healthy middle-aged adults with Alzheimer's disease, even if they have no symptoms and may never develop the condition. This expansion of the disease definition is driven by new blood tests that detect high levels of amyloid before symptoms appear. Critics argue that this could lead to mislabeling and unnecessary drug prescriptions.