Plant extracts can be used for classification of food additives.

The components of plant extracts can generally be divided into glycosides, acids, polyphenols, polysaccharides, terpenoids, flavonoids, alkaloids, etc. For example, green tea extract is mainly composed of tea polyphenols; Ginseng extract mainly contains a variety of ginsenoside monomers; According to different properties, it can be divided into extract, powder, lens, such as purple leaf extract, chrysanthemum extract, etc.

At present, there are nearly 100 kinds of popular plant extracts in the world, and the common ones are as follows:

1. Antioxidants: grape seed extract, green tea extract, pine bark extract, etc.

2. Immunomodulator: Ginseng extract, Gynostemma pentaphyllum extract, Ganoderma lucidum extract, etc.

3. Improve cardiovascular system function: gingko leaf extract, lotus seed heart extract, rhodiola extract, etc.

4. Quiescent agent: valerian extract, hops extract, etc.

5. Natural pigment: lycopene, purple sweet potato extract, etc.

6. Functional sweeteners: licorice extract, stevia extract, etc.