Tea has long been thought to have health benefits for the heart and in the prevention of cancer. Studies have found that some teas may help with cancer, heart disease, and diabetes; encourage weight loss; lower cholesterol; and bring about mental alertness.
The degree of processing the leaves of camellia sinensis determines whether a tea will be green, black or red (oolong). Green tea is the least processed. These are simply steamed quickly before packaging. Black and red teas are partially dried, crushed and fermented. The length of fermentation, which causes the leaves to blacken, determines whether the tea will be red or black.
Types of tea
White Tea: White tea is similar to green tea, in that it's undergone very little processing and no fermentation.