Broad bean is one of the oldest edible legume crops cultivated by human beings, which originated from the western plateau of Iran to North Africa. Broad beans were introduced into the Central Plains by Zhang Qian in the Western Han Dynasty. Broad bean is widely planted in China, which has been an important food resource and an important export resource since ancient times. It is cultivated all over China, and the broad beans produced in Ningbo, Zhangjiakou, Qinghai and Gansu, which are mainly south of the Yangtze River, are the four precious broad bean varieties in China.
Broad bean has high nutritional value and protein content, and contains a small amount of trace elements such as vitamins, calcium, iron, phosphorus and manganese, which can enhance memory. In addition, as a nitrogen-fixing crop, broad bean can transform molecular nitrogen in nature into nitrogen-containing compounds, increasing the nitrogen content in soil.
Extended data
Broad beans are sweet and flat, which can benefit qi and spleen, promote diuresis and reduce swelling. It is especially suitable for people with diarrhea due to spleen deficiency. Modern people think that broad bean is one of the anti-cancer foods and has an effect on preventing intestinal cancer. Vitamin C in broad bean can delay arteriosclerosis, and crude fiber in broad bean skin can reduce cholesterol and promote intestinal peristalsis.
Broad beans contain allergens, and people with allergies will have different degrees of allergies, acute hemolysis and other poisoning symptoms. Silkworm bean disease is a genetic defect because of the lack of an enzyme in the body. People who are allergic to broad beans can't eat any more. People whose parents or grandparents have suffered from this disease should not eat broad beans and their products, nor should they be contaminated with broad bean pollen.
Broad beans should not be eaten raw, and should be soaked several times before cooking; Don't eat too much to prevent abdominal distension from hurting the spleen and stomach. Eating broad beans and snails together is easy to cause colon cancer.
Baidu Encyclopedia-Broad Bean
People's Network-Diet and Health: Eating more broad beans can enhance memory.