Rather obviously, low calorie diet says that if you want to achieve weight loss, it is important to eat fewer calories than you need for exercise.
What is a calorie?
The calorie is the standard unit for energy measurement in dieting. The 'calorie' is the the amount of energy required to raise the temperature of one gram of water by one degree celsius. If a meal has more calories, then it will turn into more energy to use when your body digests it.
Foods low in calories include celery, tomato, apricots, beef based meals, and white eggs.