Citrus X limon
Lemon
Lemon, and other citrus fruits are common in the tropics worldwide. Lemon is believed to be native throughout the monsoon regions of Asia, and to have been introduced to the tropics of the Mediterranean and the Americas. Lemons found their way to Italy by 200 AD, and are thought to have been cultivated in Egypt and Iraq by 700 AD. They belong to the Rutaceae family, along with other medicinal plants Buchu (Agasthoma betulina), Rue (Ruta graveolans), and Prickly Ash (Zanthoxylum spp.). They are considered an evergreen tree that can grow up to 20 feet tall, and if the weather allows will continue to grow and fruit all year long. True lemons actually have sharp thorns lining their twigs, though some varieties have been bred to lose this trait. Lemon is not an original citrus fruit, but rather a hybrid between a citron and a sour orange.
Lemon and its citrus fruit cousins became revered by Dutch botanists in the 17th century. Orangeries, which are buildings like greenhouses that were built as extension with many windows to protect exotic trees and plants from harsh northern winters, became popular and common additions to the homes of the wealthy throughout Europe. James Lind (1716 – 1794), a Scottish surgeon, was the first to identify lemons and citrus fruits as a treatment for sailors suffering with scurvy. In rudimentary clinical trials, using 6 pairs of scurvied seamen, those who received citrus quickly recovered. Lind’s work was published in Edinburgh, Scotland in 1753, under the name Treatise of the Scurvy, and he is credited with the discovery of the cure.
Highlights
What is Lemon Used For?
Lemons hold a special place in many kitchens as a unique source of tart flavor as well as acid. Its acidity makes it useful in food preparation and preservation. Lemon juice’s acidic nature is able to prevent microbial growth, thanks to its phenolic acid compounds including gallic acid, ferulic acid, and caffeic acid. It contains many flavonoids, which act as antioxidants to help to prevent spoilage and rotting when used in foods. Energetically, Lemon is thought to be cooling. During the hot months of the summer, lemonade is used to cool the body and offer hydration, as similarly, lemon and honey in hot water is used to cool a fever and sore throat. Lemons are high in d-limonene, which has been shown to be protective to the gastrointestinal system and tissues, a part of the body that deals with heat from stomach acid and ‘digestive fire’. The essential oil of lemon can be derived from various parts of the plant, each part delivering a unique terpene profile. The essential oils of lemon can be derived from the peel tend to be high in limonene, and β-pinene. The leaves of the lemon create lemon petitgrain oil, which tends to have higher concentrations of geraniol, and neral. The blossoms of lemon were also found to be high in limonene, but also contained terpenes not found in the leaves or fruit, such as (E)-ocimene, α-terpinene, α-citrol, and β-farnesene. Lemon peel essential oil, which is the most common of the three, is used in aromatherapy for its mood uplifting and energizing affects. It is also useful in the home and kitchen for cleaning, making an impressive solvent for sticky residues.
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