生命必需的五大营养要素如蛋白质、碳水化合物、脂肪、维生素和无机元素。近年来,经对无机元素深入研究后,除对一些元素如锌、铬、硒、锰、锶等14种已证实为人体必需的微量元素外,并对宏量元素中早已被人们熟知的钙元素有了崭新的认识。儿童发育期间缺钙,临床上可出现鸡胸、方颅郝氏沟、O型腿或X型腿等体征的佝偻症。成人方面尤其是妇女怀孕和哺乳期间缺钙,最易患软骨病和老年性骨质疏松症。遗憾的是,长期以来 Five essential nutrients of life such as protein, carbohydrates, fat, vitamins and inorganic elements. In recent years, in-depth study of inorganic elements, in addition to some of the elements such as zinc, chromium, selenium, manganese, strontium and other 14 kinds of proven human essential trace elements, and macro elements have long been well-known calcium Elements have a new understanding. Calcium deficiency during child development, clinically there may be chicken breast, square skull Hao groove, O-shaped legs or X-shaped legs and other signs of hysteria. Adults, especially women who are calcium-deficient during pregnancy and lactation, are most at risk for osteomalacia and senile osteoporosis. Unfortunately, for a long time