String beans are also called green beans, snap beans and French beans. They originated in the hot climates of the Americas, China and India. In 1597, they were introduced to the French and took on popularity. Today, string beans are sold fresh, frozen and canned. They contain valuable daily nutrients and can be counted as part of the vegetable group, per the USDA MyPyramid.
Fiber Benefits
One serving of string beans, consisting of ten beans, contains 2 g of fiber. The Recommended Daily Allowance, or RDA, of fiber for adult women is 25 g, and men need 38 g. Fiber is needed to maintain health and wellness of the digestive system. Without it, constipation can occur. In addition, fiber plays a role in lowering total cholesterol and the "bad" cholesterol called low-density lipoprotein cholesterol.
Protein
A serving of string beans contains 1 g of protein. This nutrient is needed by every cell in the body for various functions. Specifically, protein is found in skin, bone, muscles and organs to support chemical reactions. In addition, protein helps the blood carry oxygen to the rest of the body. The RDA of protein is 64 to 75 g, according to the Harvard School of Public Health.
Vitamin C
String beans are a good source of vitamin C. One serving contains 8.96 mg, as highlighted by Publix Healthnotes. Vitamin C is a water-soluble vitamin, meaning it is not stored in the body. As a result, adult men and women need 75 to 90 mg a day. This vitamin supports healthy skin and tissue formation and repair. Deficiencies of vitamin C have been associated with high blood pressure, some cancers and plaque build-up in blood vessels, according to the University of Maryland Medical Center.
Carbohydrates
Carbohydrates, also called carbs, are an important source of energy for the body. The body breaks down carbs to become sugar. Every cell needs sugar for energy whether maintaining health or repairing new cells. The better sources for carbs come from fruits and vegetables, according to Harvard School of Public Health. There is not an RDA of carbohydrates, but instead, it is recommended by the National Institutes of Health to consume 40 to 60 percent of your daily calories in carbs.
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