A condition that results from a prolonged lack of food. The person suffers weight loss and changes in the body's METABOLISM, with production of potentially harmful chemicals called ketones (see KETONE) and ACETONE. Sometimes starvation may occur as a result of an eating disorder (see EATING DISORDERS – Anorexia nervosa). In cases of slow starvation, the vitality of the tissues is reduced and they become more liable to tuberculosis and other diseases. (See also FASTING.)