Beans

Beans are edible seeds produced by many plants in the legume family, Fabaceae. The term covers numerous species and varieties, including common beans, kidney beans, black beans, white beans, and pinto beans. The common bean, scientifically called Phaseolus vulgaris, is one of the most widely cultivated species.

Beans have been grown for thousands of years, especially in the Americas, where several varieties were domesticated before spreading to other parts of the world. The plants usually produce pods containing several seeds that differ in size, shape, and color. Some varieties are eaten fresh, while others are harvested when dry and stored for later use. Beans are valued for their nutritional content.

They provide plant-based protein, complex carbohydrates, dietary fiber, folate, iron, potassium, and other minerals. The combination of protein and fiber makes them a useful ingredient in many different diets. Dried beans are generally soaked and then cooked, which softens them and reduces some naturally occurring compounds that may interfere with digestion.

Raw or undercooked kidney beans can contain high levels of phytohaemagglutinin, a lectin that can cause illness, so they should be thoroughly cooked. Beans also have an important agricultural role. Like other legumes, they can form associations with soil bacteria that fix atmospheric nitrogen and convert it into forms that plants can use. This natural process contributes to the nitrogen cycle and can help maintain soil fertility.