Klevay L M, Reck S J, Barcome D F
JAMA. 1979 May 4;241(18):1916-8. doi: 10.1001/jama.1979.03290440038025.
The mean daily amounts of copper and zinc found in hospital diets by atomic absorption spectrometry were 0.76 and 9.4 mg, respectively. Comparison of these diets with published data showed median daily amounts of copper and zinc to be 0.78 and 12.0 mg, respectively, for 20 diets made from conventional foods. These amounts of copper and zinc are less than the 2 mg of copper and 13 mg of zinc thought to be required daily by adults. Hospital diets and perhaps diets in general seem to be low in copper and zinc; the amounts of copper are lower than those of zinc in comparison with respective requirements. Common dietary amounts of these elements may cause health problems.
通过原子吸收光谱法测定，医院饮食中铜和锌的每日平均含量分别为0.76毫克和9.4毫克。将这些饮食与已发表的数据进行比较，结果显示，由传统食物制成的20种饮食中，铜和锌的每日中位数含量分别为0.78毫克和12.0毫克。这些铜和锌的含量低于成年人每日所需的2毫克铜和13毫克锌。医院饮食乃至一般饮食中的铜和锌含量似乎都较低；与各自的需求量相比，铜的含量低于锌。这些元素的常见饮食摄入量可能会引发健康问题。
