University of Sydney study finds social media spreads misleading Alzheimer's test info

A study from the University of Sydney has found that social media platforms are spreading misleading information regarding Alzheimer’s disease blood tests. Researchers analyzed 188 posts on Facebook, Instagram, and TikTok shared between March 2014 and May 2025, reaching a combined audience of over 114 million followers.

The findings, published in the Journal of the American Geriatrics Society, indicate that more than one-third of the posts suggested these tests could be used to screen healthy individuals without symptoms of cognitive decline. This contradicts current clinical recommendations, which advise against routine testing for asymptomatic people. While 59 percent of the posts promoted the tests for improved or earlier diagnosis, many failed to mention that clinical assessment remains essential.

Lead author Dr. Jenna Smith noted that while social media presents exciting claims, the enthusiasm often outpaces scientific evidence. The study warns that omitting context regarding the limitations and potential downsides of these tests may lead people to develop unrealistic expectations or seek testing that is not medically recommended.