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Liquorice

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Liquorice, known scientifically as Glycyrrhiza glabra, is a flowering plant from the bean family, Fabaceae.

Sections of liquorice root
Sections of liquorice root

It is a perennial legume, which means it lives for many years. This plant is native to regions including West Asia, Tropical Asia, North Africa, and Southern Europe. People value liquorice primarily for the sweet and aromatic flavoring extracted from its roots. This extract is used widely in many industries. It appears in confectionery, tobacco, beverages, and various pharmaceuticals. It is also marketed as a dietary supplement.

The plant grows as an herbaceous perennial, reaching heights of up to 1 meter. It features pinnate leaves that are about 15 to 30 centimeters long. These leaves typically contain 9 to 17 leaflets. The flowers are long and range in color from purple to a pale, whitish blue. These flowers grow in a loose arrangement called an inflorescence. The fruit of the plant is an oblong pod that can reach 10 centimeters in length. This pod contains several seeds. The roots themselves are stoloniferous, meaning they spread via underground stems.

The unique flavor and sweetness of liquorice come from complex chemistry. Much of the sweetness is provided by a glycoside called glycyrrhizin. This compound is 30 to 50 times sweeter than ordinary sugar. However, the sensation is different from sugar because it is tart and lasts longer on the tongue. The concentration of glycyrrhizin in the root typically ranges from 7% to 10%. The yellow color of the root is caused by flavonoids. Other compounds in the root include triterpenoids, polyphenols, and polysaccharides. The distinct scent comes from various volatiles, including anethole, which makes up about 3% of the total.

Cultivating liquorice requires specific environmental conditions for success. The plant grows best in well-drained soils located in deep valleys. It also requires full sun to thrive. Farmers do not harvest the roots immediately after planting. They must wait two to three years for the plant to mature. Harvesting typically occurs during the autumn months. Major producing countries include Turkey, Greece, Iran, and Iraq.

Baton de reglisse
Baton de reglisse

Liquorice has many diverse uses across different cultures. In the tobacco industry, it acts as a flavoring and moistening agent. It is used in American blend cigarettes, pipe tobacco, and chewing tobacco. It provides a natural sweetness that blends with other flavors. In the food industry, it is a staple in many candies. In the Netherlands, people enjoy a sweet called drop. Some versions are mixed with mint or menthol. Others include ammonium chloride to create a salty version known as salmiak.

Liquiritiae radix suessholzwurzel
Liquiritiae radix suessholzwurzel

Traditional customs also feature liquorice in unique ways. In Italy, Spain, and France, people often consume the root in its natural form. They harvest, wash, and dry the root to use as a mouth freshener. In Calabria, Italy, a liqueur is made from the pure extract. In the Arab world, a cold drink called Erk al-sous is popular. This drink has a sweet and mildly bitter taste. It is especially common during the month of Ramadan. In southeastern Turkey, specifically Diyarbakır, it is a common chilled summer beverage.

While liquorice is widely used, it must be consumed with caution. The main active components, glycyrrhizin and enoxolone, can affect the body's hormones. Excessive consumption can lead to serious physiological effects. These include hypertension, which is high blood pressure, and hypokalemia, which is low blood potassium. It can also cause edema, weight gain, and muscle weakness. Some studies suggest that consuming 50 to 200 grams of liquorice per day over four weeks can cause these issues. Because of these risks, pregnant women are advised to avoid liquorice root extract.

Glycyrrhizic Acid
Glycyrrhizic Acid
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File:Glycyrrhizic Acid.svg
Glycyrrhizic Acid.svg
File:Sections of liquorice root.jpg
Sections of liquorice root.jpg
File:Baton de reglisse.jpg
Baton de reglisse.jpg
File:Liquiritiae radix suessholzwurzel.jpg
Liquiritiae radix suessholzwurzel.jpg
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