Black beans are the black seeds of soybeans, a plant of the legume family Soybean family. Black beans are produced all over the country. China's black beans are rich in resources and diverse types.
Black beans have a protein content of 36%, are easy to digest, contain 8 kinds of amino acids necessary for the human body, and are of great significance to meet the needs of the human body for protein; Fat content of 16%, mainly containing unsaturated fatty acids, absorption rate of up to 95%, in addition to meeting the body's need for fat, there is also a role in reducing cholesterol in the blood; Black beans are rich in vitamins, lutein and melanin, anthocyanins and other substances, of which B vitamins and vitamin E content is very high, with nutritional health care effects, black beans are also rich in mineral elements, such as zinc, copper, magnesium, selenium, etc., to maintain the integrity of the body's function, delay the aging of the body, reduce blood viscosity, meet the brain's demand for trace substances are essential; the isoflavones contained in black beans are a kind of phytoestrogen, which can promote the absorption of vitamin D by bone and prevent osteoporosis.
Black beans are divided into green kernel black beans and yellow kernel black beans: green kernel black beans, skin black kernel green, seed umbilical white, bean grain is more round, has the reputation of "black pearl"; Yellow kernel black bean, skin black kernel yellow, bean grain is relatively small, is kidney-shaped, also known as male bean, is a medicinal and food homologous black bean.
In addition to the color of black beans, the skin is black, how to choose? The skin color of black beans is dark, the particles are uniform, very full, shiny, and there is no white powder when rubbed, indicating that it is a relatively fresh high-quality black bean. If the size is uneven, relatively deflated, the surface is also stained with white powder, indicating that the black beans have been put for a long time, not fresh; normal black beans have a seed umbilicus, is white, if it is ordinary soybean dyeing, the whole bean will be black, is not able to see the white seed umbilicus; black beans The original melanin will not fade, but the dye will fade, draw a picture on the paper with black beans, if you can draw black, it is a fake black bean.