Herbal tea is completely different from the other varieties of tea. Herbal teas are often consumed for their physical or medicinal effects, especially for their stimulant, relaxant or sedative properties. The medicinal benefits available are varied, ranging from refreshing pick-me-ups and relaxing soothers, to extra help for digestion, sleep and your immune system. So pick carefully, or choose a selection in readiness for every health need. There are many herbal tea which are specific to a region and some which are found all over the world. Herbal tea has been quite popular in Asia over the centuries, especially in China and Japan. There are three main categories of Herbal tea: black, green and oolong.