Blood test for Alzheimer's shows 91% accuracy, with p-tau217 test approaching 90% benchmark.

Research suggests that blood tests for Alzheimer's could help doctors diagnose the disease faster and with greater accuracy, with a recent study showing a 91% accuracy rate. A test measuring p-tau217, which correlates with plaque buildup, is most likely to meet the 90% accuracy benchmark. Companies are developing p-tau217 tests, aiming for FDA approval. Doctors are advised to use blood testing for memory problem patients only after confirming test accuracy.