Age related calcium requirements due to changes in absorption and utilization.

摘要: An attempt was made to estimate average calcium requirements for various age groups by gender. The factorial method that sums accretion and endogenous losses modified fractional absorption used during growth intakes achieve balance adults. These estimates exceed the current RDA females aged 6-16 y older than 30 males 6-30 y. They also in U.S. adolescence both sexes above of 11 A number factors influence with age. Requirements is dominant until peak daily retention adolescent spurt achieved. rate varies widely, depending on estimation. Urinary increase young adulthood. Contributions fecal sweat obligatory are largely unknown growth. After ceases, menopause, unless estrogen-treated, as efficiency decreases. Data required insufficient precisely define dietary Determining which optimize retention, therefore, bone mass has been estimated Matkovic Heaney (1992) may be a sound approach. this approach will difficult given