Cereal bars are the bars made by combining different cereals like whole wheat,oats,rye and rice.The idea behind cereal bars is that they provide a quick snack or breakfast for someone who has shortage of time and cant have full breakfast. Assembling a full breakfast may be a challenge for someone with a tight schedule, and many people believe that breakfast is an important meal, so cereal bars fill the need. Someone can also snack on a cereal bar in the middle of the day, with some people carrying cereal bars so that they can keep their blood sugar under control. A cereal bar before a workout can provide more energy, and likewise with a cereal bar consumed at a low point in the work day.