what is tea
Tea is an aromatic beverage prepared by pouring hot or boiling water over cured or fresh leaves of Camellia sinensis , an evergreen shrub native to East Asia which probably originated in the borderlands of south-western China and northern Myanmar . [ 3 ] [ 4 ] [ 5 ] Tea is also made, but rarely, from the leaves of Camellia taliensis . [ 6 ] [ 7 ] [ 8 ] After plain water, tea is the most widely consumed drink in the world. [ 9 ] There are many different types of tea; some have a cooling, slightly bitter, and astringent flavour, [ 10 ] while others have profiles that include sweet, nutty, floral, or grassy notes . Tea has a stimulating effect in humans, primarily due to its caffeine content. [ 11 The term herbal tea refers to drinks not made from Camellia sinensis . They are the infusions of fruit, leaves...