China has blacklisted 151 materials forbidden or abusable in food and feed over the past nine years. The materials include 47 inedible materials likely to be added illegally to food, 22 food additives easily to be abused and 82 substances forbidden in feed and drinking water for animals.

Clenbuterol (瘦肉精): A substance used to increase the amount of lean meat in pigs. The consumption of meat tainted by clenbuterol can cause dizziness, headaches, hand tremors, palpitations, agitation and other symptoms. The greatest risks are posed to those who have heart troubles. 

Melamine (三聚氰胺): An organic base chemical used to make milk protein-rich. Ingesting melamine-tainted foods may lead to urinary disorders and bladder stones. 

Rongalite (雕白粉): An industrial bleach that can make dried beancurd sticks and starch noodles good in color. The original use of the compound was as industrial bleaching agent and as a reducing agent for vat dying. It will lead to nausea, vomiting, and cancer in the long-run. 

Sudan I (苏丹红一号): A red dye used to make chilli powder redder. Originally used for coloring solvents, oils waxes, petrol and shoe and floor polishes, it is banned in food because it can increase the risk of cancer. 

Poppy Capsule (罂粟壳): Used in soup to make it more tasty and addictive to eaters. Some side-effects have been noted with use of poppy capsules and seeds, including twitching, dizziness, general weakness, and headaches.