Health ads fund misinformation sites, study finds

A new analysis reveals that health misinformation ads have unintentionally been funded by trusted organizations, including government agencies and nonprofits, raising fresh concerns about public trust and digital oversight.

Researchers from Yale University found that more than $35 million in advertising between 2021 and 2024 was placed on websites known for spreading misleading or false health information.

Even as officials like Vivek Murthy have warned about the dangers of misinformation, some of those same public health efforts have indirectly supported it through digital ad placements.

How trusted organizations ended up funding misinformation

The study, conducted in collaboration with NewsGuard, identified 11 websites that regularly promote health misinformation while still receiving ad revenue from credible institutions.

According to researchers, health and government organizations accounted for over 10% of the total ad revenue earned by those sites.

Nonprofits and government agencies among advertisers

While wellness and supplement companies made up the largest share of spending, reputable organizations were also involved.

Groups such as the American Heart Association and the Alzheimer’s Association were found to have ads appear on these platforms, though at relatively small spending levels.

The Department of Health and Human Services was also identified among entities whose advertising appeared on misinformation sites.

All organizations emphasized that these placements were unintentional and said they take steps to review and correct such issues when identified.

Impact on public trust remains unclear

Experts warn that even limited exposure could have broader implications. Ads from trusted organizations may lend credibility to unreliable platforms, potentially reinforcing misinformation narratives.

However, the actual impact on public behavior remains difficult to measure.

Researchers say combating misinformation may ultimately depend less on digital controls and more on individual trust in science and critical thinking skills—often shaped through direct conversations with healthcare professionals.

A growing challenge in the digital age

The findings highlight a growing tension in modern health communication. As organizations rely more on automated digital tools to reach audiences, they also face increased risk of losing control over where their messages appear.

The health misinformation ads issue underscores the complexity of managing public health messaging in an online ecosystem where credibility and visibility are not always aligned.