| http://www.w3.org/ns/prov#value | - Just like other leafy greens, most varieties of lettuce (leaf, Cos or romaine, crisphead, butterhead, and stem) are an excellent source of vitamins and minerals including vitamin A, vitamin C, beta-carotene, folic acid, and potassium; are low in saturated fat, cholesterol, and calories; and are a good source of dietary fiber.
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