Tangyuan is yellow and poisonous when cooked. If the yellow color is obvious or even dark, it may be that the glutinous rice flour used for Yuanxiao has gone bad. If the dumplings bought in the market are yellow, it may be because there are additives in them. Deteriorated glutinous rice flour is polluted by a kind of Flavobacterium fermented rice flour. The bacteria died immediately after heating, showing yellow-red color, but the xanthotoxin A released by the bacteria remained in rice flour, which was toxic and might cause gastrointestinal discomfort after eating.

Selection method of glutinous rice balls

Pay attention to three points when buying jiaozi. First, try to buy in reputable and guaranteed shopping malls. The second is to choose well-known brands with stable quality. Third, pay attention to whether the food packaging labels are complete. According to national regulations, food packaging must be marked with product name, ingredient list, net content, factory name, address, telephone number, production date, shelf life and product standard number. As for the brands, Sanquanling Tangyuan, Missing Tangyuan, Longfeng Tangyuan, Cody Tangyuan, Jiatianxia Tangyuan and Daoxiang Village Tangyuan are all very good.