Botanical Overview
Commonly known as Onion, this species belongs to the Liliaceae family. Traditional healers across continents have independently recognized the medicinal value of this species, leading to one of the most extensive ethnobotanical records available. The lily family (Liliaceae) includes bulbous herbs with erect stems, alternate leaves, and showy six-parted flowers with prominent stamens. The underground bulbs serve as storage organs rich in carbohydrates. Many species contain steroidal saponins and alkaloids with medicinal properties.
General Description
The shallot is a botanical variety of the onion which was classified as a separate species until 2011. The onion’s close relatives include garlic, scallion, leek, and chives.
Family Context
The Liliaceae family is widely distributed in temperate regions. Notable medicinal members include:
- American Hellebore — 52 documented uses
- Glory Lily — 36 documented uses
- Asparagus — 31 documented uses
- European Squill — 30 documented uses
Geographic Distribution
Onion has been recorded in 10 countries and territories worldwide, including Afghanistan, Germany, Spain, France, United Kingdom, and others.
Traditional Uses
Onion has been traditionally used for digestive health, respiratory conditions, and skin and wound care, among other applications.
Digestive health.
- Vermifuge
- Carminative
- Dysentery
- Stomachic
- Ache(Stomach)
For digestive complaints, the herb is typically prepared as a tea or decoction taken before meals. The bitter compounds stimulate digestive secretions and improve nutrient absorption. Some traditions use the powdered root or leaves in small doses as a stomachic tonic.
Respiratory conditions.
- Expectorant
- Bronchitis
- Catarrh
- Cold
Respiratory conditions are addressed through steam inhalation of the herb’s vapors or internal use as a warm tea. The hot infusion acts as an expectorant, helping to loosen phlegm and clear congestion. Some traditions combine it with honey for coughs.
Skin and wound care.
- Abscess
For skin conditions, the fresh or dried plant is applied topically as a poultice, wash, or compress. A strong decoction can be used to clean wounds and sores. The antimicrobial properties help prevent infection while promoting tissue repair.
Active Compounds
Phytochemical research has identified 30 compounds in this species, including a diverse array of phytochemical classes (see the Complete Chemical Inventory below for the full list).
The identified compounds include the following categories:
- Sterol: cholesterol-like compounds with anti-inflammatory properties
- Alkaloid: nitrogenous compounds with diverse pharmacological activities