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Super-Vegetables that Cost Less than $2

(Deborah Enos, CN, LiveScience) Not all vegetables are expensive, but they're also not created equal. For example, iceberg lettuce is inexpensive, but it contains less protein, fiber, calcium, folate and vitamin K per calorie than its pricier counterpart, romaine. If you look at the lettuces in terms of penny per nutrient, instead of penny per calorie, romaine is the clear winner.
And speaking of nutritional winners, a study … reported two clear winners in the overall cost-per-nutrient category: potatoes and beans (beans are classified as a vegetable by the USDA).
Researchers used a combination of nutrient profiling methods and national average pricing to create an affordability index, which was used to examine the nutrients in 98 individual vegetables as well as five subgroups. The fact that potatoes come out on top is surprising to some, but potatoes are extremely rich in potassium, fiber, vitamin C and magnesium. And, they're cheap too!
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