Biscuits differ from other baked cereal products such as bread and cakes by having a low moisture content. Bread typically has 35 - 45% moisture, cake, 15 - 30%, and biscuits, 1 - 5% moisture. This low moisture content ensures that biscuits are generally free from microbiological spoilage and have a long shelf life if they are protected from absorbing moisture from damp surroundings or atmosphere. Biscuits have relatively high energy density compared with other baked goods.