Meal replacement is the best approach to slimming down and achieving a healthy weight loss. Nutrition bars and meal replacements are designed to provide nutritional boost for those needing extra fuel for workouts. Meal replacement generally refers to a calorie-controlled, prepackaged product in the form of a bar or beverage replaces a regular meal. The average calorie of a meal replacement product usually varies between 200 to 250 calories. The meal replacement products are fortified with more than 20 vitamins and minerals. Meal replacement products were used mainly by elderly adults with some nutritional deficiencies. However recent studies show that meal replacement products are used by young athletes and those associated with sports and fitness. Meal replacement products are an excellent way of getting balanced nutrition for specific purposes such as weight loss, maintenance and weight management.