Did you know that just a half cup of raw radishes will give you 15 percent of your daily recommended dose of Vitamin C? For only 9 calories. See NutritionData.com for an interesting analysis of radishes. Here is a break-down from their site (which is well worth a visit):

As you can see, there are a number of important minerals in radishes, not in huge, but appreciable amounts, especially potassium. Radishes also have some anti-inflammatory properties.

Potassium and Vitamin C are important for the proper functioning of many aspects of the body and overall wellbeing, but if you are having frequent muscle cramps, try boosting your potassium intake. Oranges and potatoes are also helpful in this regard.

In addition to the often spicy red roots of radishes, you can eat the greens, prepared much as one would kale.

Or, for a delicious soup, try this Radish-Top Soup recipe from Organic Gardening Magazine:

Wash, dry, and coarsely chop about 1 pound of radish tops. Heat some butter in a heavy-bottomed pot, add the leaves and a bit of salt, stir, and cover. Cook, stirring occasionally, over medium high heat for 5 minutes. Add two medium potatoes, diced, and a quart of water or chicken stock. Cover partially and simmer until the potatoes are tender, about 20 minutes. Blend in a food processor until smooth and return to the pot. Season to taste. Stir in a bit of creme fraiche, and garnish with dollops of additional creme fraiche, small crisp croutons, plus thinly sliced raw radishes.

Take care of your nutrition, and your health will take care of you.