Caffeic acid is found in many plants, such as cohofa of the ranunculaceae, cymbidium of the rose family, polygonum of the chrysanthemum family, mint, dandelion, valerian, eucommia ulmoides and lemon peel. Caffeic acid is also found in coffee, lemon and hawthorn. Caffeic acid is a kind of phenolic acid compound, which is light yellow crystalline powder, soluble in hot water and cold ethanol, but insoluble in cold water. Its molecular structure contains unsaturated double bond, easy to be oxidized, unstable in alkaline solution, caffeic acid aqueous solution is green when ferric chloride.
Caffeic acid is widely used in the field of medicine, is an important pharmaceutical raw material, it plays a positive role in anti-cancer, cardiovascular protection, immune regulation, anti-inflammatory, antiviral and other aspects.
Caffeic acid is mainly used for hemostasis in clinical application, and can prevent thrombocytopenia, leukopenia, primary thrombocytopenia, aplastic leukopenia and other phenomena caused by tumor chemotherapy. Taking caffeic acid can be quickly absorbed by the body, usually within 30 minutes after taking effect could be achieved with peak, about half of the caffeic acid can be absorbed by human body, mainly in the small intestine absorption parts, in the blood, kidney and other organs in the distribution of intensive, there will be a small amount of caffeic acid penetration into the blood brain barrier and placental barrier.