Importance of animal products in the human diet.

Increased interest in food, nutrition, and health has led to critical evaluation of the American diet by governmental, scientific, and consumer groups. The exact role of diet in health and disease continues to be debated. Over the years trends in consumption of foods and nutrients have developed. These issues are examined. Historically, animal products have played a key role in the overall health of Americans. The contributions of animal products to human nutrition are emphasized along with an introduction to the use of the concept of nutrient density.