This study examined the independent and interactive association between dietary restraint, body mass index and the relative reinforcing value of food. 403 psychology students completed questionnaires assessing age, gender, BMI, hunger, smoking status, nicotine dependence, dietary restraint, hedonic ratings for snack food and F&V and the relative reinforcing value of snack food and F&V. Findings suggest that BMI moderates the relationship between dietary restraint and snack food reinforcement in females. such that restraint and snack food reinforcement are inversely correlated in females with lower BMI, but restraint is positively correlated with snack food reinforcement in females with higher BMI.