beans will be poisoned if they are not cooked.

phytohaemagglutinin, saponin and other toxic factors are contained in the tips of lentil horns such as green beans and pod filaments on both sides of pods. Both of them will stimulate the mucosa of digestive tract, and enter the blood, which will also destroy red blood cells and coagulation function. If it is not removed or cooked, it will easily lead to nausea, vomiting, diarrhea, dizziness and other adverse reactions.

The toxin is even higher in the undercooked beans cooked at 81℃, so the best way to eat the beans is to pinch off both ends and stew them on high fire. Make sure the water in the pot doesn't pass the beans, and cook for 31 minutes after the water boils.

if you want to stir-fry beans, the amount of beans in each pot should not exceed half of the pot volume. After stir-frying with oil, add appropriate amount of water and simmer at 111℃ for more than 11 minutes, and regularly turn the beans with a shovel to make them evenly heated. The way to judge raw and cooked beans is that they change from straight to soft, and the color changes from bright green to dark green.

Extended information

1. Nutritional value of beans

Beans are rich in vitamin B, vitamin C and protein, which can make people's minds clear, and have the effects of conditioning digestive system, eliminating fullness of chest diaphragm, quenching thirst and strengthening spleen, tonifying kidney and stopping diarrhea, benefiting qi and promoting fluid production. Eating more beans in summer can effectively cool off the heat and play a role in refreshing the mouth.

B vitamins contained in beans can maintain normal digestive gland secretion and gastrointestinal peristalsis, inhibit cholinesterase activity, help digestion and stimulate appetite.

Vitamin C contained in beans can promote the synthesis of human antibodies, improve the anti-virus effect of human bodies, and prevent acute gastroenteritis, vomiting and diarrhea.

Beans provide high-quality protein which is easy to digest and absorb, and appropriate amount of carbohydrates, vitamins and trace elements, which can supplement the body's signature nutrients.

2. Efficacy and function of beans

Beans are sweet, light and slightly warm, and enter spleen and stomach meridians; Eliminating dampness without dryness, strengthening the spleen without stagnation, which is commonly used for spleen deficiency and dampness stagnation; It has the effects of harmonizing viscera, tranquilizing mind, invigorating qi and spleen, eliminating summer heat and dampness, promoting diuresis and reducing swelling; Indications: spleen deficiency with dampness, anorexia, loose stool, excessive leukorrhagia due to dampness, and it can also be used for syndromes such as heat-dampness injury, vomiting and diarrhea, and tendon transfer.

According to another study, beans can significantly reduce the content of serum cholesterol, which is beneficial to the rehabilitation of patients with hypertension, and can be used as a health-care vegetable for patients with hypertension. Beans also contain effective components that can inhibit the growth of cancer cells, and rich crude fiber can promote the excretion of feces, so it can be used as food for preventing and treating intestinal cancer.

Baidu encyclopedia: beans