Chinese tea green, oolong, black and post-fermented. Others add categories for scented and compressed teas. All of these come from varieties of the "Camellia sinensis" plant. Most Chinese teas are cultivated and consumed in China, however are also exported internationally due to a rise in the popularity of Chinese cuisine worldwide. It is commonly available in Chinese Restaurants and grocery shops worldwide. Green tea is the most popular type of tea consumed in China. Within these main categories of tea are vast varieties of individual beverages. Some researchers have counted more than 700 of these beverages. Others put the number at more
Black tea point, it is referred to as being "stewed" in the UK). When the tea has brewed long enough to suit the drinker's taste, it should be strained before serving. The ISO Standard 3103 defines how to brew tea for tasting. The biggest producers of black tea in the world are: Plain black tea without sweeteners or additives contains caffeine but negligible quantities of calories or nutrients. Some flavored tea with different herbs added may have less than 1 gram of carbohydrates. Black teas from the Camellia sinensis tea plant contain polyphenols known as thearubigins and theaflavins. Meta-analyses of observational studies