what are the chemical contents of green tea extract? Is there caffein? How much? ## Generally, the main green tea ingredients are caffeine (formerly called theine), tannin (flavonols), theophylline, theobromine, fat, wax, saponins, essential oils, polyphenols particularly catechins, carotene, vitamin C, vitamins A, B1, B12, K and P, flouride, iron, magnesium, calcium, strontium, copper, nickel, and zinc. It also has trace elements such as molybdenum and phosphorus, as well as 300 additional substances (which I haven't been able to locate). It is important to know that the quantitative proportions of these active green tea ingredients vary according to the area of cultivation (altitude, climatic region) and the growth stage of the leaf. As far as caffeine content, the younger leaves ...