Synopsis There are a large number of books that deal with the subject of nutrition but the present book deals with the basic principles of nutrition in such a way that they are of interest to the inquisitive students. Various topics related to nutrition such as the nutrients present in diet, their necessity, their functions, their sources, their food value, their role for an individual, their inter-relationship, their use to make life more useful etc. have been dealt with in a brief and precise manner. An attempt has been made to avoid presenting experimental details but in some cases, the details have been provided to show how the experimental work is carried out in the field of nutrition. An attempt has been made to present the topic in the light of modern development in a simple language. The book is expected to serve as a textbook at undergraduate level and post-graduate level of home science students. It is also likely to serve as a reference book for professionals working in the field.