Increases in dietary restraint and decreases in disinhibition are associated with greater weight loss during obesity treatment but their relationship with dietary intake is less clear. Seven hundred and seventy-two overweight and obese adults participated in a randomised controlled trial of two 12-month weight loss interventions. Participants were weighed and completed the TFEQ-R21 and a 4-day food diary at 0, 6 and 12 months. Separate multiple regression models examined 12-month changes in TFEQ-R21 scores for Cognitive Restraint, Uncontrolled Eating and Emotional Eating and their relationships with changes in body weight (kg), energy intake (kJ) and fat intake (% kJ), adjusted for treatment, gender, centre, and baseline measures. Increases in Cognitive Restraint were associated with greater weight loss (β=0.8, p<0.001) and larger reductions in energy intake (β=19.2, p< 0.001) and fat intake (β=0.05, p=0.03). Decreases in Uncontrolled Eating were associated with greater weight loss (β=0.1, p<0.001) and larger reductions in energy intake (β=25.1, p<0.001). Decreases in Emotional Eating were associated with greater weight loss (β=0.1, p<0.001) and larger reductions in energy intake (β=13.8, p<0.001). These findings highlight the role of eating behaviour traits during weight loss and demonstrate associations with energy intake, and potentially food choices.