The method of processing creates the different types. Vitamins C and E and beta carotene are also prevalent in green tea. Enough fluoride is found in green tea to help reduce plaque formation and bacterial infections in the mouth. Green teas are as varied and unique as wines. Their uniqueness depends upon the growing region, the season's weather, time of harvesting and type of processing.
Many varieties are available in multiple grades.
The majority of green teas come from Japan, China or India. Processing of the tea varies between the different regions so this is just a basic overview. The finest teas come from the most aromatic, young, top two leaves and the unopened leaf bud of the plant. After picking, the green leaves are spread out in the hot air to wither. Once they are soft, they are traditionally pan-fried in woks.