It may look dainty and delicate, but this leafy green--with its unique spicy flavor--is brimming with nutritional potential.

The ancient Greeks and Romans believed that watercress promoted strength and character. Hippocrates is said to have picked the green from the streams flowing by his hospital and served it to his patients as a blood purifier. Watercress's historical renown even extends to the taste buds, with its Latin name, nasturtium, alluding to a peppery bite that "twists the nose." The plant no doubt brings a zesty spin to the standard stable of leafy greens.

Health Benefits While there's no solid evidence to support the hypothesis of the ancients, modern studies do show that the nutrients in watercress can help our eyes, bones, and overall health. Watercress contains the antioxidant duo lutein and zeaxanthin, which may help protect against macular degeneration. It also packs in betacarotene: Once converted by the body to vitamin A, this nutrient safegaurds vision, aids cell regeneration, and helps regulate the immune system.

Watercress harbors its fair share of vitamins and minerals, too. Its vitamin C protects the body's important molecules like proteins and carbohydrates, promotes cardiovascular health, and may help ward off the common cold. One cup of watercress provides nearly the daily requirement of vitamin K, which assists with healthy blood clotting and building bones. The mineral manganese also helps keep bones strong, as well as aid in the conversion of certain nutrients into energy.

The spiciness in watercress comes from sulfur-containing phytonutrients called glucosinolates. studies suggest these compounds can help reduce DNA damage and display powerful anticarcinogenic properties. Given the green's notoriously pungent taste, it makes sense that watercress contains a high concentration of glucosinolates compared to its cruciferous cousins.

How to buy Watercress is available year-round. Look for healthy, green leaves and sniff for a fresh, spicy scent. When home, store in a plastic bag in the refrigerator for up to four days.

Cooking tip Watercress's popularity around the globe shows shows in its versatility in the kitchen; it makes an excellent addition to everything from soups and salads to stir-fries and sandwiches. To clean, snip off the lower stems and, holding the bunch upside down, swish the leaves in a bowl of cold water. Shake or spin dry.

Did you know If you have a cool, clan creak or stream nearby, you can grow watercress yourself; its roots naturalize easily in shallow water and limestone soil. If you don't, plant seedlings in a small, permeable terra-cotta pot and set it in a plastic tray. Place in a semi-shaded area and keep the tray filled with clean water.

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