Tea extract is the water extract or alcohol extract of tea. It is rich in bioactive components, including tea polyphenols, L-theanine, alkaloids, tea polysaccharides, tea saponins, vitamins, trace elements and mineral elements. It has the functions of delaying aging, inhibiting cardiovascular diseases, preventing and treating cancer, refreshing, regulating fat and helping digestion. Clinically, it is commonly used in headache, dizziness, sleeping, upset and thirsty, food accumulation and phlegm stagnation, malaria, dysentery and other syndromes.