The FDA greenlit marketing for the first blood test to help diagnose Alzheimer’s disease. Experts believe this will increase access to Alzheimer’s detection and reduce reliance on expensive PET scans and invasive spinal taps.

The Food and Drug Administration has cleared the blood test to help diagnose Alzheimer's disease, potentially making it easier to find and treat patients.

Experts say the test could dramatically improve access to earlier, more accurate diagnoses, particularly for older Americans experiencing memory and thinking problems.