Red Bengal, also known as red bengal pigment, is the liquid red bengal pigment extracted from red yeast rice through ethanol, or in the red bengal mold through the extraction of the material, crystallization and other ways to obtain the material, mainly rendered as a liquid or paste, powdered, is a more safe and stable natural food additives. As the raw materials and the extraction process are safer, red currant will not produce toxic and harmful substances, so it can be added in meat products, fruit juice, jam, cookies, yogurt, candy and other foods, but also can be added in drugs, cosmetics, and will not have a negative impact on the human body. Since red yeast red is water-soluble, it can be directly dissolved by water according to the required dosage and used for coloring, and its coloring power for protein is strong. Since red yeast is acid and alkali resistant, it can be added to food to regulate the pH of food. In addition, it is also characterized by high light and heat resistance. In addition to red crimson, β-carotene, turmeric, sorghum red, chlorophyllin copper sodium salt, cochineal red are also safer natural pigments, can be used as coloring agents in food, drugs, cosmetics.