Nutritional practices of diabetics reflect both human behavior and the health culture of such patients. They also represent how the diabetic deals with the health/illness issue. The purpose of this survey was to identify and relate nutritional practices with metabolic control, age, sex, years of schooling, and time since diagnosis of illness. The sample was taken from 114 cases selected through systematic random sampling in five family practice units in Guadalajara. Using thirteen structured, coded, and quantified questions of the Likert type, the study evaluated nutritional practice with a range of 0-65. Results showed that 21% of the diabetics had appropriate nutritional practices (>31 points), and when related with years of schooling and time since diagnosis of illness, they showed statistically significant differences (p=0.05). Simple regression showed that 9% of metabolic control can be explained by nutritional practices.