美《纽约时报》最近报道:菠菜是主要营养食物,具有丰富的营养价值,特别是维生素A,钾和铁含量很多。这种被人们大力称赞的蔬菜也含有对营养不利的草酸。草酸与某些矿物结合,特别是钙和锌,防止了机体吸收钙、锌. 美国农业部的一位科学家凯尔瑟对上述结合物对营养的后果进行了试验。12名男性自愿受试者食用了不同的实验性饭菜,每种特殊饭菜食用28天. 第一种饭菜是低纤维食物和菠菜;第二种 The United States “The New York Times” recently reported: spinach is the main nutritious food, rich in nutritional value, especially vitamin A, potassium and iron content. This highly praised vegetable also contains malodorous oxalic acid. Oxalic acid binds to certain minerals, especially calcium and zinc, and prevents the body from absorbing calcium and zinc. Kelso, a scientist at the U.S. Department of Agriculture, tested the nutritional consequences of the combination. Twelve male volunteers consumed different experimental meals, each for 28 days, the first being low-fiber and spinach, the second