No additives are allowed in the production of bean sprouts, but those small workshops use at least 4 kinds of additives, such as urea, hormones, growth agents, etc. Adding urea and 6-benzylaminoadenine can make Bean sprouts grow thick and long, and can shorten the production cycle and increase the germination rate of soybeans. However, after people eat it, nitrite will be produced in the body, and long-term consumption can cause cancer. This is the so-called "poisonous bean sprouts". In addition, additives such as rootless bean sprouts (rootless agents), plant growth regulators, thickening agents, etc. are all hormones, and long-term consumption can cause various diseases.

When soaking bean sprouts, you need to use a root-free agent. The function is to prevent the bean sprouts from growing roots. In addition, bleaching powder and bean sprout growth and thickening agent are also used. The function of bleaching powder is that when the color of bean sprouts turns yellow or dim, you only need to spray a certain proportion of bleaching powder water on the bean sprouts. After ten minutes, the bean sprouts will immediately become thicker. It's white and fresh. Needless to say, thickening agent, some plump-looking bean sprouts are due to it. The operation process is to add a certain proportion of water to the thickening agent and then spray it on the bean sprouts. Compared with rootless auxin, the thickening agent does not have to be used every day, but only needs to be used once every two or three days.