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钙是维护健康之本,但人体缺钙现象并非罕见,无论男女老幼均有发生。据1982年全国膳食营养调查的资料表明,处于生长发育时期的儿童和青少年,膳食中缺钙的现象尤为普遍。北京地区调查表明:北京市各类人群普遍存在膳食中钙的摄入量不足,儿童青少年组膳食
Calcium is the basis of maintaining health, but the phenomenon of calcium deficiency in the body is not uncommon, both men, women and children have occurred. According to the 1982 National Dietary Nutrition Survey data show that in the growth and development of children and adolescents, calcium deficiency in the diet is particularly prevalent. Beijing area survey showed that: all kinds of people in Beijing generally lack of dietary calcium intake, children and adolescents group diet