To find out whether teens' involvement in a non-profit organization's Food and Nutrition education program resulted in a change in the quantity of food they ate. Fifty-five low-income teenagers participating in an NGO received a six-month nutritional intervention that included six visits with dietitians and strategic communication and relationship initiatives. At baseline and after the intervention, body weight, height, BMI, nutrition and eating behaviors questionnaire, one day recall and diet quality evaluation of the Digital Food Guide's Diet Quality Index were collected. Dietary pattern improvement required a 5-point rise in the Digital Food Guide's Diet Quality Index. Food labels were better understood and daily and weekend eating habits. Fruits, vegetables, dairy goods, legumes, and milk consumption increased (adequate components). However the intake of whole grains and nuts was low while that of items that should be eaten in moderation was high. The effort altered the eating habits of teenagers, making it a practical and affordable way to promote health, avoid illness. The diet quality index in the digital meal guide has also proven useful for analyzing dietary changes and directing future counseling and nutritional intervention efforts.