Tea contains only four calories per cup when consumed without added ingredients but is a source of several B-complex vitamins, including B2 and nicotinic acid. Caffeine is responsible for tea's stimulating effect. Flavour is produced by volatile oils, and astringency and colour by tannin. Teas are classified according to region of origin, as in China, Ceylon, Japanese, Indonesian, and African tea, or by smaller district, as in Darjeeling, Assam, and Nilgris from India, Uva and Dimbula from Sri Lanka, Keemun from Chi-men in China's Anhwei Province, and Enshu from Japan. Teas are also classified by the size of the processed leaf.
Traditional operations result in larger leafy grades and smaller broken grades.
For Earl Grey fans this sampler offers Earl Grey, Double Bergamot Earl Grey and Earl Green.