Human food choices are complex and are conditioned by biological, social, cultural, historical and psychological variables. This dissertation aimed to investigate psychological aspects of food choices, such as motivations and personality factors, and their relationships with psychological health. For this, three articles were presented. The first tests the relationships between food choices, the big five personality factors and psychological health in a Brazilian sample. The second investigates differences in aspects of personality and psychological health in different dietary groups. The third presents relationships between motivations for food choices and the five major personality factors. In general, the results presented are consistent with previous international studies. In the first article, positive relationships are highlighted between openness to experience, awareness and psychological health with the consumption of fruits and vegetables. In the second article, no expected differences in personality traits were found across different diet groups. In the third article, expected relationships were found between the consciousness factor and reasons for food choices, in addition to the positive relationship between the humor factor and neuroticism. It is expected that these results will contribute significantly to the literature on the topics involved, in addition to providing valuable therapeutic applications for psychologists, nutritionists and nutritionists in the exercise of their professions. Understanding the relationships between personalities, reasons for food choices and their psychological relationships with health, it is possible to think of personalized strategies that can be more personalized according to the needs of each patient, with regard to their own food choices, promoting a style healthier lifestyle in general.