Abstract. This paper explores several published studies that report on results from research conducted on the relationship between the Big Five Inventory BFI, super traits and weight loss success. Despite generally identifying Conscientiousness C and Neuroticism N as factors of influence the studies vary in their findings regarding their effect on weight particularly for N. Some studies suggest that N encourages weight gain whereas others pose that it stimulates weight loss most agree on C s slimming properties. This paper examines studies in relation to all five super traits to suggest that further research should be conducted in order to determine the true influence of both C and N on an individual's given weight and eating behaviors. Keywords. Big Five Inventory, weight loss, Conscientiousness, Neuroticism, eating behaviors. Certain personality traits might make it easier or harder for individuals to lose weight. What does the literature say about the relationship between personality factors in the Big Five Inventory and weight loss success. Amongst the hierarchical models of personality, the Five-Factor Model FFM or Big Five Inventory BFI is considered as the one that best explains unique differences in each of its individual abstract facets. The FFM and BFI are made up of five super traits. Openness to experience O. Conscientiousness C . Extraversion E. Agreeableness.