Botanical Overview
Roselle (Hibiscus sabdariffa) is a flowering plant in the Malvaceae family. Traditional medicine systems have documented several valuable applications for this species, supported by its observed therapeutic effects. The mallow family (Malvaceae) includes herbs, shrubs, and trees with alternate leaves, often with stellate hairs. The flowers are typically showy with five petals and numerous stamens fused into a column. Many species produce mucilage and have demulcent and emollient properties.
General Description
In the 16th and early 17th centuries it was spread to Asia and the West Indies, where it has since become naturalized in many places. The stems are used for the production of bast fibre and the calyces are commonly steeped to make an infusion popular in many places around the world.
Family Context
The Malvaceae family is widely distributed worldwide. Notable medicinal members include:
- Chinese hibiscus — 51 documented uses
- Broomweed — 49 documented uses
- Indian tulip tree — 49 documented uses
- Okra — 36 documented uses
Geographic Distribution
Roselle has been recorded in 10 countries and territories worldwide, including Australia, Burkina Faso, Benin, Brazil, Cameroon, and others.
Traditional Uses
Roselle has been traditionally used for digestive health, urinary tract health, and nervous system disorders, among other applications.
Digestive health.
- Dyspepsia
- Laxative
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.
Urinary tract health.
- Diuretic
Urinary tract applications typically involve drinking the herb as a mild tea, which increases urine production and helps flush the urinary system. It may be combined with other demulcent herbs to soothe irritated tissues.
Nervous system disorders.
- Sedative
Nervous system support involves taking the herb as a warm tea, often in the evening or before bed. The calming compounds interact with neurotransmitter systems to promote relaxation and restful sleep.
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:
- Terpene: aromatic compounds with anti-inflammatory and antimicrobial properties
- Alkaloid: nitrogenous compounds with diverse pharmacological activities