CONTEXT: Although researchers have not yet examined the applicability of mindfulness for weight-gain prevention, mindfulness training has the potential to increase an individual's awareness of factors that enable an individual to avoid weight gain caused by overconsumption.OBJECTIVE: The study intended to examine the effects of 1 h of mindfulness training on state mindfulness and food consumption. METHODS: The research team performed a pilot study. SETTING: The study occurred at an urban, northeastern, Catholic university. PARTICIPANTS: Participants were 26 undergraduate, English-speaking students who were at least 18 y old (77% female, 73% Caucasian). Students with food allergies, an inability to fast, or a current or past diagnosis of an eating disorder were ineligible. INTERVENTION: Participants fasted for 4 h. Between the third and fourth hours, they attended a 1-h session of mindfulness training that integrated three experiential mindfulness exercises with group discussion. Following training, they applied the skills they learned during a silent lunch. PRIMARY OUTCOME MEASURES: The Toronto Mindfulness Scale (TMS), the Awareness subscale of the Philadelphia Mindfulness Scale (PHLMS-AW), and a modified version of the Acting with Awareness subscale of the Five-Facet Mindfulness Questionnaire (FFMQ-AW) were used preand posttraining to assess changes in state mindfulness, present-moment awareness, and mealtime awareness, respectively. A postmeal, subjective hunger/fullness Likert scale was used to assess food consumption (healthy vs unhealthy consumption). RESULTS: The study found a statistically significant increase in state mindfulness (P=.002). Eighty-six percent of participants engaged in healthy food consumption. No statistically significant changes occurred in either present-moment awareness (P=.617) or mealtime awareness (P=.483). CONCLUSION: Preliminary results suggest promising benefits for use of mindfulness training on weight-gain prevention in healthy individuals. More research is needed to understand the impact that mindfulness may have on long-term, weight-gain prevention.