This document discusses nutritional requirements for adults. It begins by introducing health and nutrition, then discusses a balanced diet and the food group classification system suggested by ICMR. It notes the principles of planning meals, including meeting nutritional requirements, considering family needs and economic constraints. The document also discusses functional foods and their antioxidant values, noting foods like beetroot, beans, cabbage, walnuts and guava. It defines a functional food as one that has a positive health effect through properties like antioxidants, detoxifying agents or blocking/suppressing agents.