New Blood Test Could Revolutionize Alzheimer's Diagnosis

The test, which measures levels of a protein linked to Alzheimer's in the blood, could detect the disease up to 15 years before symptoms appear and may become as routine as cholesterol checks.

A new blood test could detect Alzheimer's disease up to 15 years before symptoms appear by measuring levels of a protein called p-tau217 in the blood.
The test has been hailed as a major step forward and could be used to screen people over 50, potentially revolutionizing Alzheimer's diagnosis.
The test is as predictive as more expensive and invasive methods, such as lumbar punctures or amyloid PET scans, which are only available in about one in 20 NHS memory clinics.
Experts believe the blood test could become as routine as monitoring cholesterol to help prevent heart disease.
UK regulators are currently assessing two antibody therapies, lecanemab and donanemab, which actively clear toxic proteins from the brain and have shown potential in slowing cognitive decline in patients with early symptoms of Alzheimer's.