The chemical compositions of tea leaves
Fresh tea leaves contain 75%-80% of water, and 20%-25% of stem compounds, which are mainly categorized into tea polyphenols, proteins, alkaloids, amino acids, mineral compounds, vitamins, pigments, fats and fragrance elements .
Tea Polyphenols content is of the highest amount and plays a key role for tea quality and its health effects. Compared with other plants, tea plants contain higher amounts of caffeine, Vitamin C and E and the mineral compounds such as potassium, fluoride, aluminum, etc.