Studies have shown that a high intake of dark-leafy vegetables, such as spinach or cabbage, may significantly lower a person's risk of developing type 2 diabetes. Researchers at the University of Leicester said that the impact of dark green vegetables on human health should be investigated further after they gathered data from six studies. They reported their findings in the BMJ.

Spinach, for example, is very rich in antioxidants, especially when uncooked, steamed, or very lightly boiled. It is a good source of vitamins A, B-6, C, E, and K, as well as selenium, niacin, zinc, phosphorus, copper, folic acid, potassium, calcium, manganese, betaine, and iron.

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