By Sheldon Margen and Dale A. Ogar
Spinach is a treasure trove of nutrients: riboflavin, vitamin B6, folate, magnesium, beta carotene, lutein, zeaxanthin, potassium and vitamin C. Some of the vitamin C will be lost in cooking, it's true, and the iron and calcium -- on which spinach built its reputation -- are not fully available to the body because they're bound up by a compound known as
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