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The diet of an organism is what it eats, which is largely determined by the perceived palatability of foods. Dietitians are health professionals who specialize in human nutrition, meal planning, economics, and preparation. They are trained to provide safe, evidence-based dietary advice and management to individuals (in Health and disease) as well as to institutions. A poor diet can have an injurious impact on health, causing deficiency diseases such as scurvy, beriberi, and kwashiorkor; health-threatening conditions like obesity and metabolic syndrome; and such common chronic systemic diseases as cardiovascular disease, diabetes and osteoporosis.

Nutritional science investigates the metabolic and physiological responses of the body to diet. With advances in the fields of molecular biology, biochemistry and genetics, the study of nutrition is increasingly concerned with metabolism ad metabolic pathways; the sequences of biochemical steps through which substances in living things change from one form to a other.

This book contains the fundamental and basic information of subject and the selection of contents makes it an appropriate book for the students as well as for scholars.