Schools are increasingly seen as having a promising role to play in reducing adverse health and wellness outcomes among young people. This paper uses a collaborative action research approach to examine the effects of one school's efforts to change its students' eating habits by implementing a "junk-food free campus." By engaging school administrators and students in a six-month process of joint research design and analysis, the author found that students understood but did not necessarily support the policy. Despite students' uneven support of the policy, however, there was some evidence that some students were developing healthier eating habits. Moreover, student researchers reported developing greater perspective and respect for the policy as a result of studying it.