Most plant pigments have no side effects and high safety. Most of the plant pigments are anthocyanins, carotenoids and flavonoids, a kind of bioactive substances, which are functional active ingredients in plant medicine and health food. In view of the use of plant pigments as a coloring additive in food, medicine and cosmetics, the dosage is not up to the proportion of medical and health products. In the application of health food, this kind of plant pigments can be used to enhance the human immune function, anti-oxidation, reducing blood lipid and other auxiliary effects, some of the ordinary food can play the role of nutritional strengthening and antioxidant.
The coloring tones of plant pigments are more natural, which can increase the hue and natural color, which is a natural beauty. Plant pigments in plant body content is relatively small, separation and purification is difficult, some of the coexistence of the existence of a potential odor, so the production cost is higher than synthetic pigments.
Most plant pigments are sensitive to changes in light, heat, oxygen, microbial and metal ions and ph values, and their stability is poor; the use of a part of plant pigments to add oxidants, stabilizers can improve the use of the product cycle.
Most of the plant pigment dye is poor, dyeing is not uniform, do not have a synthetic pigment beautiful bright.
The variety of plant pigments, complex nature, in terms of a plant pigment, the application of a strong specificity, the scope of application has some limitations.