In China, illegal processing of wolfberries to enhance their color has been uncovered in the largest producing areas, Golmud City, Qinghai Province, and Jingyuan County, Gansu Province. The investigation revealed the use of sodium metabisulfite in Golmud City and excessive sulfur dioxide in Jingyuan County. Despite knowing the health risks, merchants continue to use these harmful substances to improve the appearance and increase the selling price. These contaminated wolfberries are consumed through various means, including hot pot restaurants, small medicine shops, tea bags, and wine, raising concerns about the safety of these products.