![]() ![]() Several clinical trials examining the effects of peppermint oil on irritable bowel syndrome (IBS) symptoms have been conducted. Human studies on the GI, respiratory tract and analgesic effects of peppermint oil and its constituents have been reported. Animal model studies demonstrate a relaxation effect on gastrointestinal (GI) tissue, analgesic and anesthetic effects in the central and peripheral nervous system, immunomodulating actions and chemopreventive potential. In vitro, peppermint has significant antimicrobial and antiviral activities, strong antioxidant and antitumor actions, and some antiallergenic potential. The main volatile components of the essential oil are menthol and menthone. The phenolic constituents of the leaves include rosmarinic acid and several flavonoids, primarily eriocitrin, luteolin and hesperidin. Evidence-based research regarding the bioactivity of this herb is reviewed. Peppermint tea, brewed from the plant leaves, and the essential oil of peppermint are used in traditional medicines. Mentha × piperita ‘Lime Mint’ has lime-scented foliage.Peppermint (Mentha piperita L.) is one of the most widely consumed single ingredient herbal teas, or tisanes.Mentha × piperita ‘Crispa’ has wrinkled leaves.This classification includes a number of varieties including eau de Cologne mint, grapefruit mint, lemon mint, and orange mint. Its flowers open from the bottom up its flavour is reminiscent of the flavour in Andes Chocolate Mints, a popular confection. Mentha × piperita ‘Candymint’ has reddish stems.CultivarsĪ number of cultivars have been selected for garden use: They may be allowed to lie and wilt a little before distillation, or they may be taken directly to the still. The wild form of the plant is less suitable for this purpose, with cultivated plants having been selected for more and better oil content. The leaves and flowering tops are used they are collected as soon as the flowers begin to open and can be dried. It grows best with a good supply of water, without being water-logged, and planted in areas with part-sun to shade. For the home gardener, it is often grown in containers to restrict rapid spreading. They grow quickly and cover the ground with runners if it is permanently moist. Young shoots are taken from old stocks and dibbled into the ground about 1.5 feet apart. Peppermint generally grows best in moist, shaded locations, and expands by underground rhizomes. Peppermint grown in a pot outside a house Outside of its native range, areas where peppermint was formerly grown for oil often have an abundance of feral plants, and it is considered invasive in Australia, the Galápagos Islands, New Zealand, and the United States in the Great Lakes region, noted since 1843. Being a hybrid, it is usually sterile, producing no seeds and reproducing only vegetatively, spreading by its runners. Peppermint typically occurs in moist habitats, including stream sides and drainage ditches. Peppermint is a fast-growing plant once it sprouts, it spreads very quickly. The chromosome number is variable, with 2n counts of 66, 72, 84, and 120 recorded. Flowering season lasts from mid- to late summer. ![]() The flowers are purple, 6–8 mm ( 1⁄ 4– 5⁄ 16 in) long, with a four-lobed corolla about 5 mm ( 3⁄ 16 in) diameter they are produced in whorls (verticillasters) around the stem, forming thick, blunt spikes. The leaves and stems are usually slightly fuzzy. They are dark green with reddish veins, and they have an acute apex and coarsely toothed margins. The rhizomes are wide-spreading, fleshy, and bear fibrous roots. It is a herbaceous rhizomatous perennial plant that grows to be 30–90 cm (12–35 in) tall, with smooth stems, square in cross section. Peppermint was first described in 1753 by Carl Linnaeus from specimens that had been collected in England he treated it as a species, but it is now universally agreed to be a hybrid. Peppermint flowers 1887 illustration from Köhlers Medicinal Plants Mentha piperita and Mentha haplocalyx are both recognized as plant sources of menthol and menthone and are among the oldest herbs used for both culinary and medicinal products. While Western peppermint is derived from Mentha piperita, Chinese peppermint, or “Bohe”, is derived from the fresh leaves of Mentha haplocalyx. Īlthough the genus Mentha comprises more than 25 species, the one in most common use is peppermint. It is occasionally found in the wild with its parent species. Indigenous to Europe and the Middle East, the plant is now widely spread and cultivated in many regions of the world. Peppermint ( Mentha × piperita, also known as Mentha balsamea Wild) is a hybrid mint, a cross between watermint and spearmint.
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