The right kind of food is the most important single factor in the promotion of health ; and the wrong kind of food is the most important single factor in the promotion of disease. " The human body builds up and maintains healthy cells, tissues, glands and organs only with the help of various nutrients. The body cannot perform any of its functions, be they metabolic, hormonal, mental, physical or chemical, without specific nutrients. The food which provides these nutrients is thus one of the most essential factors in building and maintaining health. Nutrition, which depends on food, is also of utmost importance in the cure of disease. The primary cause of disease is a weakened organism or lowered resistance in the body, arising from the adoption of a faulty nutritional pattern. There is an elaborate healing mechanism within the body but it can perform its function only if it is abundantly supplied with all the essential nutritional factors. It is believed that at least 45 chemical components and elements are needed by human cells. Therefore, the absence of any of them will result in disease and eventually in death.