New cancer drugs often get approved even when experts are not fully sure about the good or the bad parts. Usually, patients do not hear about these doubts. A pair of studies wanted to change that. They asked a simple question. Does telling people the honest truth about the shaky evidence change how they decide to take the medicine?
To find out, researchers ran two separate tests using regular adults online. They made sure the group matched the country well, balancing age, sex, income, education, and race and ethnicity. This work took place from May 9 through July 26 in 2025. Rather than using hard medical words, the team wrote plain sentences explaining the uncertainty.
In the first test, volunteers were split into five groups. Each group learned about one specific worry. Maybe the study