Six chatbots tell teens about prescription quit-smoking drugs 32 to 67 points less often
The authors put the same four smoking-cessation questions to six widely deployed LLMs from twelve user personas, for 2,880 responses. Every model named FDA-approved prescription cessation medications less often to teen personas than to adult personas, by 32 to 67 percentage points. In five of six models, a persona presenting healthcare expertise got fewer facts. A short system prompt setting a factual floor narrowed persona gaps in every model, but its effect on overall fact coverage varied.