A protein bar is a nutritional supplement and meal replacement that is designed to address the daily health needs of men, women, and children. The bars consist of organic ingredients essential for nutrition. Proteins such as soy and whey (a by-product of milk), are usually used to produce these bars. Recently, it has become a common trend among most leading food companies to manufacture these healthy, low carbohydrate bars. Protein bars are the best substitutes for meals and usually come individually wrapped. They are also considered to be a great food source that helps to burn extra fat.