It is said that there is no such Negative Calorie foods, not even lettuce or celery unless they are really chewed. Negative Calorie foods are helpful for losing your weight. Negative calorie diet is related with the fact that there are some foods which burn more calories while in the process of digestion in comparison to the actual calorie content of the food itself. So we can say that roasted chana is not a negative calorie food. Mainly you can include fruits and vegetables in negative calorie food. You can take a bowl of strawberry or an orange in your breakfast.