Temulawak: The Master Root

Temulawak (*Curcuma zanthorrhiza*) is the most studied and most commercially significant medicinal plant in Indonesian jamu tradition — a large-rhizomed relative of turmeric with a distinct, more bitter-camphoraceous character and a scientific literature documenting liver-protective (hepatoprotective), anti-inflammatory, and digestive-stimulating effects that go beyond the anecdotal. The plant is endemic to Java and Kalimantan; its cultivation has spread across Southeast Asia but Indonesian — particularly Javanese — production remains the benchmark. In traditional Javanese jamu practice, temulawak is categorised as a *jamu keras* (strong jamu) — its effects are considered potent and its use is specific rather than casual. The major Indonesian jamu company Sido Muncul (publicly listed, Semarang-based) has invested in scientific validation of temulawak compounds, producing research on curcuminoid content and bioavailability that has entered the international literature. · Preparation