Saffron, produced in Spain, Iran, etc., and later introduced in Shanghai, China. According to the theory of Chinese medicine, saffron is sweet in taste and slightly cold in nature. It enters the heart and liver meridians. It has the effect of activating blood stasis, relieving depression and tranquilizing the mind, cooling the blood and detoxifying the toxin. It is used clinically for amenorrhea, obstruction after childbirth, depression, palpitation and frenzy, warming and poisoning. Saffron contains saffron acid, saffron saffronin, saffron glucoside and other chemical components, monomers including terpenoids, flavonoids, etc.. Modern pharmacological research shows that it has 1. the effect of liver protection, can prevent liver damage caused by alcohol. 2. the effect of regulating blood lipids. 3. the effect of regulating immune function. 4. the effect of preventing and treating nephritis. 5. the effect of scavenging free radicals, antioxidant. 6. the effect of delaying aging, anti-tumor, etc.