Objective: To interpret the perception of the determining factors that influence the diet of a group of intern patients in a drug rehabilitation center in Concepción, Chile, during the year 2015. Materials and methods: Through a qualitative design with a phenomenological approach, intern patients of a drug rehabilitation facility, who fulfilled the study assigned criteria, were interviewed. The collection of data was conducted through semi structured interviews; which were validated by experts and subject to a pilot test. Nonprobability convenience sampling was performed. The sample size was determined through theoretical saturation, which was completed at the eighth interview. The results were subject to triangulation of informants, and were analyzed using the technique of discourse analysis. Results: The participants identify positive and negative factors that condition their diet. Th...