Most of us think of lettuce as not so nutrient-dense and a good, bland backdrop for dressing. Romaine lettuce is a good source of calcium, vitamin B6, iron, and other essential nutrients. Even iceberg lettuce has more going for it than crunch. It’s a great source of vitamin A, C, K, B6, iron, and potassium. Buy lettuce whole; wash and hand shred it to preserve the most nutrients. They may be easy to use, but shredded salads in a bag have lost a lot of their nutritive value.
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