An herb is a plant or plant part used for its scent, flavor, or therapeutic properties. It  may be recommended that an herbal prescription be taken to complement Acupuncture therapy. They are sold as tablets, capsules, powders, teas, extracts, and fresh or dried plants. The use of herbs to treat disease is almost universal among non-industrialized societies, and is often more affordable than purchasing expensive modern pharmaceuticals. The World Health Organization (WHO) estimates that 80 percent of the population of Asian countries presently use herbal medicine for some aspect of primary health care.