Botanical Overview
Tea (Camellia sinensis) is a flowering plant in the Theaceae family. The traditional uses of this species reflect its genuine medicinal value, validated by generations of practical experience. This species belongs to the Theaceae family, a group of flowering plants.
General Description
Its leaves, leaf buds, and stems are used to produce tea. Common names include tea plant, tea shrub, and tea tree (unrelated to Melaleuca alternifolia, the source of tea tree oil, or the genus Leptospermum commonly called tea tree). White tea, yellow tea, green tea, oolong, dark tea (which includes pu-erh tea) and black tea are all made from two of the five varieties which form the main crops now grown, C. sinensis var. sinensis and C. s. var. assamica, but are processed differently to attain varying levels of oxidation with black tea being the most oxidized and white being the least. Kukicha (twig tea) is also made from C. sinensis, but uses twigs and stems rather than leaves.
Family Context
The Theaceae family is widely distributed. Notable medicinal members include:
- Camellia — 13 documented uses
- Eurya japonica — 5 documented uses
- Eurya acuminata — 2 documented uses
- Ternstroemia gymnanthera — 2 documented uses
Geographic Distribution
Tea has been recorded in 10 countries and territories worldwide, including Brazil, China, Indonesia, India, Japan, and others.
Traditional Uses
Tea has been traditionally used for digestive health, respiratory conditions, and skin and wound care, among other applications.
Digestive health.
- Carminative
- Dysentery
- Stomachic
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.
- Cold
- Expectorant
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.
- Eruption
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:
- Phenolic: antioxidant compounds that neutralize free radicals