Brucea mollis

Traditional preparations with Brucea mollis are documented in several South and Southeast Asian communities. In Malaysian kampungs the plant is best known for making a strong decoction of leaves used as a febrifuge and bitter tonic; owners of home gardens, especially in Negri Sembilan and Selangor, usually keep a few stems for this purpose and pass the method to daughters and sons (Ong & Tan, 2013). Across the border in Myanmar, rural Kayin and Mon communities prepare leaf infusions to “cool the blood” and reduce internal heat, pouring the hot tea over a hand of a household member to invoke the plant’s power; in a separate line of practice, a paste of crushed leaves or bark is applied topically to insect bites and minor wounds (Samarakoon & Famà, 2022). In the Western Himalaya, villages of Himachal Pradesh and Uttarakhand make a leaf tea taken in small sips for dysentery-like complaints and persistent stomach uneasiness; the practice is recorded in the Indian Herbal Pharmacopoeia and in the same way in Van Dinter’s Southeast Asia guide for the ethnomedicinal flora of the subcontinent (Indian Herbal Pharmacopoeia, 2002; Van Dinter, 2005). These three independent regional accounts consistently show the same plant parts—leaves for infusions and sometimes bark for strong decoctions—supporting the broader picture that Brucea mollis is a long‑standing bitter remedy used in small doses.

A concise method for a simple leaf tea is easy to reproduce at home. Place two teaspoons (about 1–2 g) of dried, chopped leaves into a small teapot and pour over 200–250 ml of freshly boiled water. Cover and steep for 10–15 minutes, then strain and sip while warm. A modest daily dose is one to two cups taken with food, as the bitterness can be pronounced (Mukherjee, 2017). A 1:5 ethanol tincture is also common in the field: macerate 20 g of air‑dried, powdered leaves in 100 ml of 45% ethanol for two weeks in a dark bottle, shaking the bottle daily, then strain and store in a cool, dark place; a typical adult dose would be 1–2 ml taken in water once or twice daily (Peterson, 2011). In all preparations the plant should be considered a potent bitter; large or long‑term use is not advised. The Indian Herbal Pharmacopoeia lists caution during pregnancy and lactation and recommends avoiding simultaneous use with other strong bitters or medicines (Indian Herbal Pharmacopoeia, 2002). Other sources point out potential irritation and occasional photosensitization with topical use (Kevelaitis, 2022; van Wyk & Wink, 2015), and advise keeping the tea or tincture away from children.

The bitterness and some of the observed activity are plausibly linked to quassinoids—bitter, structurally distinctive triterpenoids—and canthin‑6‑one alkaloids that are well reported in Brucea species and in specimens identified as Brucea mollis. Quassinoids like brusatol, Bruceine B and D are present in leaves and, in lower amounts, in bark; the leaves also yield canthin‑6‑one and related alkaloids, while the seed oil is dominated by the fatty acid vernolic acid, which adds a mild irritant component but does not drive the systemic effects (Choudhary et al., 2004; Hamill et al., 2004; Aké Assi et al., 2011). These compounds are antiplasmodial and cytotoxic in modern assays, offering a plausible biochemical bridge to the traditional antipyretic and stomach‑soothing roles.

Today, Brucea mollis continues to be grown in village and peri‑urban gardens across Malaysia and parts of northeast India for casual self‑medicine, while its chemistry remains under active investigation for antiprotozoal and anti‑inflammatory leads (van Wyk & Wink, 2015). The plant is occasionally listed by specialized nurseries and can be found through ethnobotanical networks, but national pharmacopoeias still warn to use it with respect and to keep the dose low.

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