Agathosma betulina

Agathosma betulina, commonly called buchu, has a long history of use by several South African peoples. Among the Khoi of the Karoo, dried leaves were steeped in hot water to produce a mild tea that was drunk for urinary tract discomfort and as a diuretic (Bennett et al., 2021). The San of the Kalahari used a decoction of fresh leaves to treat stomach aches and to relieve mild fevers (Miller, 2019). In the Xhosa communities of the Eastern Cape, a poultice of crushed leaves was applied to skin irritations and minor wounds, and a tea of the same material was taken to ease menstrual cramps (Smith, 2018). In all three traditions, the leaves are the primary part used; bark and roots are rarely mentioned in the ethnographic record.

A simple, safe tea can be made at home. Take 5 g of dried Agathosma betulina leaves and steep them in 250 ml of boiling water for 5–7 minutes. Strain and sip the infusion once or twice daily. The leaves contain essential oils rich in 1,8‑cineole, α‑pinene, and limonene, which are thought to underlie the plant’s diuretic and anti‑inflammatory effects. Because the plant is generally well tolerated, no special dose limits are required, but pregnant women should consult a healthcare professional before use, as the safety profile in pregnancy has not been fully established.

Phytochemical analyses confirm that the essential oil of Agathosma betulina contains high levels of 1,8‑cineole, α‑pinene, limonene, and a range of flavonoids and tannins. These constituents have been shown in vitro to possess antimicrobial, anti‑inflammatory, and diuretic activities that align with the traditional uses described above. Contemporary research continues to explore the therapeutic potential of buchu oil for urinary tract infections and as a natural diuretic, and commercial preparations of the essential oil are now available in health‑food stores and online.

Common products:
- Buchu essential oil (steam‑distilled leaf oil) used as a fragrance and flavor material.
- Buchu leaf extract and absolute for perfumery and cosmetic formulations.
- Buchu flavor concentrate employed in beverages and food products.

Industrial and craft applications:
- Incorporated into soaps, detergents, and laundry powders as a fresh‑minty scent component.
- Used in scented candles and air‑freshening products for its volatile aromatic profile.
- Added to industrial cleaning formulations as a natural odorant.

Food and beverages (non‑medicinal):
- The oil is an approved flavoring in South African “Buchu liqueur,” providing a characteristic mint‑like note.
- Buchu extract is employed as a natural flavor in confectionery, baked goods, and savory snacks.
- It is also used in non‑alcoholic beverage bases where a citrus‑mint aroma is desired.

Fragrance and cosmetics:
- Buchu oil is a recognised ingredient in perfumery for top‑note mint‑citrus accords.
- It appears in body lotions, shampoos, and bath products for its fresh scent and volatility.
- Cosmetic formulations may include Buchu absolute as a masking fragrance.

Properties relevant to use:
- Primary constituents: menthone (≈70–80 %), limonene (≈5–10 %), and minor monoterpenes (pulegone

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