Soymilk is nutritious. Its iron content is six times that of milk. Although its protein content is not as high as milk, it can be absorbed by human body more than milk, so it is also called "plant milk".
However, if soybean milk is not cooked thoroughly, trypsin and saponin contained in soybean milk will stimulate the stomach and cause nausea, vomiting and partial diarrhea. Generally, soybean milk will bubble when cooked to 80 degrees, but this is just an illusion of boiling. At this time, many people mistakenly thought that soybean milk was cooked. In fact, it takes 3-5 minutes to cook at this time, so that the harmful substances in soybean milk can be destroyed and lose their activity. Under the condition of suitable temperature, taking soybean milk as nourishment, bacteria will multiply in large numbers, and after 3 or 4 hours, soybean milk will deteriorate.
If you drink soy milk on an empty stomach, most of the protein in soy milk will be converted into heat and consumed in the human body, so the nutrition will be gone. It is best to eat some starchy foods such as bread and steamed bread at the same time.
If it is undercooked, no matter whether it is soybean or soybean milk, as long as it is a bean product, it contains ingredients that destroy protein, such as trypsin inhibitor and so on.