Beans are the best vegetable source of protein. They contain all the essential amino acids, carbohydrates and a complex of vitamins of group B. Also, the fruits of vegetable beans contain 50-60% carbohydrates, provitamin A (carotene), ascorbic acid, vitamins of group B, PP, mineral salts, enzymes. In the unripe fruits of beans, there is more protein than green peas and beans, as well as carotene. And vitamins are contained in optimal ratios for the human body.