Eating vermicelli often will affect children's intelligence. According to the relevant personnel of the quality inspection department, the national standard strictly stipulates that coloring agents and alum are not allowed to be added in the production process of vermicelli. At the same time, it is forbidden to use industrial chemicals such as sulfur and sodium formaldehyde sulfoxylate in food processing. According to industry insiders, the quality of most fans in the market in our city is still up to standard, but there are also some fan manufacturers who will add alum in the processing and production process to solidify and increase the toughness of fans. Children should eat less vermicelli because their nervous system is developing; Excessive alum may affect the development of fetal nervous system, so pregnant women should also eat less vermicelli. In addition, the vermicelli is mainly starch with high sugar content.