At present, some unscrupulous vendors hardly add any sweet potato ingredients in the process of making vermicelli, and almost all the expensive fake vermicelli are processed with cassava flour and various additives. Inferior vermicelli contains not only alum, but also formaldehyde, which exceeds the standard by more than 400 times and heavy metals by more than 200 times. Long-term consumption may increase the risk of cancer. Therefore, I suggest that when buying vermicelli, don't be greedy for cheap and buy some inferior vermicelli.

2. Fresh-keeping baby dishes

In order to make the doll dish last longer and look more attractive, the merchants with bad doll dishes will prepare a preservative with formaldehyde when packaging and soak the roots of the doll dish in the preservative for a while. When selecting, we mainly choose baby dishes with snow-white roots and clean appearance, which may be suspected of soaking formaldehyde.