Social media drives harmful misuse of Alzheimer's blood tests, researchers warn

Researchers warn that social media is encouraging healthy individuals to take Alzheimer's blood tests, leading to anxiety over biomarkers like p-tau217 and p-tau181 that may not result in dementia. The tests, when used alone, risk misinforming people about their inevitable dementia risk. This highlights a gap between biomarker availability and clinical guidance, with potential psychological harm.