How to read labels: Cereal bars

Generally consumed between meals to fill a little gap in the late morning or as a small break between two bits of work or as a reward after a long session of sport, cereal bars are the most convenient food for nibbling. Easy to carry, you can take them wherever you want, satisfying your hunger at any time of the day. The question is though, despite their enormous popularity, are these snacks really that good for you, or should we be avoiding them?