A nonprofit health system headquartered in Phoenix, operating 33 hospitals across six states.
Researchers have published long-term data showing that very high blood levels of the tau marker p‑tau217 predict a 38% risk of cognitive impairment within five years and 78% within ten. Trials are using the test to recruit volunteers while Scotland has started a primary‑care rollout of p‑tau testing to study real‑world use.
The FDA has cleared four blood tests to help diagnose Alzheimer's in people with memory problems, a move that could speed access to therapies. Experts caution that tests are not for asymptomatic individuals, and many questions remain about accuracy. Readers are advised to focus on brain-healthy risks like blood pressure, diabetes and smoking.