1、 Artificial spices. It is a fragrance substance that has not yet been discovered in natural products (whether processed or not) for human consumption. There are few varieties of such spices, and they are all made by chemical synthesis methods, and their chemical structure has not yet been found in nature. Based on this, the safety of this type of spice has attracted great attention from people. In China, all spices listed in GB/T 14156-1993 "Spices and Codes for Food Use" have undergone certain toxicological evaluations and are considered harmless to the human body (under certain dosage conditions). Except for a few varieties that have undergone thorough toxicological evaluation, they are currently listed as temporarily licensed for use.
2、 Natural equivalent spices. It is a substance obtained by synthesis or separated from natural aromatic materials through Chemical process. These substances are chemically identical to those present in natural products (whether or not processed) for human consumption. There are many kinds of such spices, accounting for the majority of food spices, which are very important for the preparation of food essence.
3、 Natural spices. It is a substance separated from natural aromatic plants or animal raw materials using pure physical methods. They are generally considered to have high safety.