A negative reaction to food that doesn't involve the immune system.

Nutrients the body uses to build and maintain its cells and tissues.

A tough complex carbohydrate that the body cannot digest.

Food that your body needs to grow, to repair itself, and to supply you with energy.

A unit of heat used to measure the energy your body uses and the energy it receives from food.

The natural physical drive to eat, prompted by the body's need for food.

The psychological desire for food.

Starches and sugars found in foods, which provide your body's main sources of energy.

A waxy, fatlike substance.

Compounds found in food that help regulate many body processes.

Elements found in food that are used by the body.

A condition in which the bones become fragile and break easily.

A set of recommendations about smart eating and physical activity for all Americans.

An interactive guide to healthful eating and active living.

A high ratio of nutrients to calories.

Substances added to a food to produce a desired effect.

Food poisoning.

Treating a substance with heat to kill or slow the growth of pathogens.

A condition in which the body's immune system reacts to substances in some foods.

The spreading of pathogens from one food to another.