Zemel says that when calcium levels are low, the body releases a hormone that helps squeeze the most out of every available milligram of the mineral.

• 泽莫尔博士说，当人体中的钙含量偏低时，身体里就会产生一种荷尔蒙，它能帮助肌体最大限度地吸收所摄入的钙。