For decades, diagnosing Alzheimer's disease required expensive PET brain scans or a spinal tap. In May 2025, that changed.
The FDA cleared the first blood test for Alzheimer's disease, a simple lab draw that detects amyloid plaques in the brain, the hallmark indicator of the disease. A second approved test can be administered right in a primary care office.
The test is said to be more than 91 percent accurate.
This test is not a treatment. It tells doctors and patients what they are dealing with earlier.
