Some may not be ingredients in food, and some are ingredients in food, such as vitamin A, vitamin E and beta carotene. Like vitamin B2, it is yellow in color and can be used as a pigment. Vitamin C and vitamin A have antioxidant function and can be used as antioxidants in food additives. Another example is sodium bicarbonate, which is baking soda, or surface alkali. This product has standards and testing methods. When it is added to food, the existing detection technology can't distinguish whether it is carbonate ion in food or added. For example, sweeteners, chemical synthetic pigments and preservatives, we basically have inspection methods for these chemicals, because we have stipulated the maximum dosage and residue in food.

Inspection: There are now more than 2,300 kinds of additives, and the GB2760 standard stipulates the scope, limit and principle of use. In other words, it can only be used in a limited amount within a specific range, which is safe. At present, some standards are missing. What is missing is the product quality standard of additives. This is a historical situation. The original product standards, including food safety standards, are scattered in various departments, and the food hygiene standards are in charge of the health department. This is illegal food additive.