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Green Leafy Vegetables High in Potassium

By Meg Campbell

Potassium is an indispensable nutrient -- not only does it facilitate normal nerve, muscle and organ function, but it also counteracts sodium and protects against high blood pressure. Despite these major health benefits, however, potassium intake in the United States falls far short of the recommended 4,700 milligrams a day. Including green leafy vegetables in your diet is an easy way to get more potassium, as they tend to be excellent sources.

Beet Greens

The next time you buy a bunch of beets, don’t discard the leafy tops -- these dark tender greens are more nutritious than the bright red root. Beet greens are one of the most potassium-rich foods you can eat -- a 1-cup serving of the cooked vegetable delivers 37 percent of the recommended daily value, according to the USDA National Nutrient Database. Cooked beet greens are an excellent source of vitamins A, C and K, as well.

Swiss Chard

Given that chard and beets are closely related, it’s no surprise that Swiss chard packs the same kind of nutritional punch. Swiss chard is set apart from other large-leaf greens by a white -- or red, pink, yellow, orange or purple, as the case may be – edible stalk. The mild-tasting vegetable is an excellent source of potassium, providing 27 percent of the recommended daily value per cup of cooked greens. It also supplies more iron than most greens.

Amaranth Leaves

Amaranth is primarily cultivated for its tiny nutrient-dense seeds, which have been touted as the “miracle grain” of the ancient Aztecs, according to "Wellness Foods A to Z: An Indispensable Guide for Health-Conscious Food Lovers." The plant’s tender green leaves are just as nutritious as its seeds, however, and are widely available at health food stores and farmer’s markets. According to the USDA, you’ll get 24 percent of the daily value for potassium from a 1-cup serving of cooked amaranth leaves. You’ll also get substantial amounts of calcium, iron, vitamin C and folate.

Spinach

Spinach is arguably the most nutritious green leafy vegetable in the average American diet. Spinach is from the same family as beets and chard, and like its botanical cousins, it’s a low-calorie source of several vitamins and minerals, including potassium -- a 1-cup serving of the cooked vegetable supplies 24 percent of the recommended daily value, according to the USDA. You’ll get the same amount of potassium from a serving of cooked taro leaves, which are often marketed as Tahitian spinach.

Considerations

Cooked greens are far more concentrated by volume than uncooked greens, which is why the raw variety doesn’t generally pack enough potassium per serving to qualify as an excellent source. Leafy greens also become more concentrated when they’re frozen. According to the USDA National Nutrient Database, a 1-cup serving of fresh cooked kale provides just 8 percent of the daily value for potassium, whereas kale that was frozen prior to cooking supplies 12 percent of the recommended daily value per serving. (ref 7, 8)

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