Food can be defined as the nutritive material taken into an organism for growth,
work, or repair and for maintaining the vital processes. Food sustains life, and, as
such, many individuals view food as an uncomplicated, pure source of nutrition.
Therefore, such individuals are often bewildered to learn that food is comprised of
an array of natural chemicals, and not all the chemicals are nutrients or enhance
nutritive value, but in fact may decrease nutritional value or, worse still, are toxic
(e.g., naturally occurring toxicants).