New Alzheimer's blood test predicts who is likely to develop dementia in 5 to 10 years

This material may not be published, broadcast, rewritten, or redistributed. ©2026 FOX News Network, LLC. All rights reserved. Quotes displayed in real-time or delayed by at least 15 minutes. Market data provided by Factset. Powered and implemented by FactSet Digital Solutions. Legal Statement. Mutual Fund and ETF data provided by LSEG. Dr. Jeremy Koppel, co-director of the Litwin-Zucker Center, discusses a new blood test capable of predicting Alzheimer's risk up to 10 years in advance. A simple blood test detecting a specific protein linked to Alzheimer’s disease may help predict future cognitive decline in older adults up to a decade before any noticeable symptoms appear, according to a new study. The Harvard-led research, presented at the Alzheimer's Association International Conference in London and simultaneously published in The Journal of the American Medical Association, could transform how doctors assess dementia risk and help patients prepare for the disease. By measuring a blood biomarker called p-tau217, which tracks the buildup of damaging proteins in the brain, clinicians may soon be able to assess Alzheimer's risk much like they use cholesterol tests to estimate heart