Calcium intake: a lifelong proposition.

The need for significant amounts of calcium in the diets of growing children has been well-documented. However, recent evidence suggests that calcium continues to play a vital role in the body throughout life and that current RDAs for calcium need to be increased. This article reviews the current problem of low calcium intake in the United States among all age groups, the role of calcium in the formation and maintenance of bone mass, and major factors influencing calcium absorption. The specific problem of calcium deficiency and osteoporosis is discussed and current recommendations for RDAs are provided. The importance of the individual building as much bone mass as possible prior to the age of 30 is discussed.