Most plant pigments have no side effects and high safety. Plant pigments are mostly anthocyanins, carotenoids and flavonoids, which are a kind of bioactive substances and functional effective components in plant medicines and health foods. In view of the fact that plant pigments are used as coloring additives in food, medicine and cosmetics, the dosage can not reach the dose-effect ratio of medical care and health care products. In the application of health food, this kind of plant pigment can play an auxiliary role in enhancing human immune function, antioxidation and reducing blood fat. Some common foods can play an auxiliary nutritional strengthening and antioxidant role.

The coloring tone of plant pigment is natural, which can not only increase the tone, but also approach the natural color, which is a kind of natural beauty. The content of plant pigment in plants is small, so it is difficult to separate and purify, and some of it may produce odor, so the production cost is higher than that of synthetic pigment.

Most plant pigments are sensitive to light, heat, oxygen, microorganisms, metal ions and pH changes, and their stability is poor. In use, some plant pigments must be added with oxidants and stabilizers to improve the service life of commodities.

Most plant pigments have poor dyeing power, are not easy to dye evenly, and do not have the bright and bright color of synthetic pigments.

There are many kinds of plant pigments and their properties are complex. As far as a plant pigment is concerned, it has strong specificity in application and its application scope has certain limitations.