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Currently, the spinach is still recognized as one of the largest vegetable intake of iron and vitamin A, highlighting also the high content of calcium, potassium, sodium and phosphorus. Medically, the spinach is something emollient and laxative, and high iron intake characterized as a food of high anti-anemic power. In contrast, spinach also has a high oxalic acid content, which combines with calcium to form calcium oxalate crystals, which can generate calculations and also reduce the availability of dietary magnesium and iron. It has also been associated with the disease methodological hemoglobinuria, accumulation of nitrates.