Is Iceberg Lettuce Nutritionally Worthless?

There are many who say the popular, crunchy iceberg lettuce is so devoid of nutrition it is not worth eating. Yet a quick look at a food composition table reveals this variety has dietary fiber, lots of water as well as vitamin K, folate, and beta-carotene. However, bibb lettuce has 6 times the beta-carotene, and romaine provides…

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