The term calorie density, is used when describing the calories per pound of individual foods. Calorie density can make a significant impact on whether you lose or gain weight. Things like vegetables have very low calorie density. This is the reason vegetarians and vegans tend to be thinner than those who have a diet consisting of high calorie dense foods. Being mindful of calorie density when choosing foods, can definitely assist in weight loss, in addition to many other things. It’s just one factor to the weight loss puzzle.