The catechins and polysaccharides in green tea have been shown to play a key role in this reduction, this has helped in the treatment of diabetes. Green tea can help to suppress ageing . Powerful antioxidising agents such as vitamin E and vitamin C restrain the ageing process, green tea contains both these vitamins. The main active ingredient of green tea, catechin, is thought to be a far stronger antioxidant than the two vitamins, adding to the strong weight of evidence that suggests green tea makes you look younger. Green tea refreshes the body .
Green tea contains caffeine which has a strong stimulating effect.
Green tea has an advantage over coffee because the green tea caffeine combines with catechin to produce a rather milder, more natural, effect. Green tea deters food poisoning . Green tea has the ability to kill certain bacteria. For instance, it's strong sterilizing effect on bacteria is used in the treatment of diarrhea. Green tea is considered as one of the three major non-alcoholic beverages in the world.