Calcium and dairy products play major roles in health maintenance and the prevention of chronic disease. Because peak bone mass is not achieved until the third decade of life, it is particularly important for young adults to consume adequate amounts of calcium, protein and vitamin D found in dairy products to support health and prevent osteoporosis later in life. In a study in the July/August issue of the Journal of Nutrition Education and Behavior, researchers report that young people actually reduce their intake of calcium and dairy products as they enter their twenties.