Jamu is a traditional Indonesian herbal drink made from natural ingredients like turmeric, ginger, tamarind, and other roots, bark, and leaves. Dating back to at least 1300 AD, it remains a daily health practice for millions of Indonesians, comparable in cultural significance to Ayurveda in India or traditional Chinese medicine in China. The name itself comes from two ancient Javanese words: “Djampi” (healing) and “Oesodo” (health).
Roots in Javanese History
Jamu has been part of Indonesian life since at least the era of the Mataram Kingdom in Central Java. Archaeological evidence supports this long history. At the Liyangan site on the slopes of Mount Sindoro in Central Java, researchers found cobek and ulekan artifacts, the traditional mortar-and-pestle tools used to grind herbal ingredients into drinkable preparations.
The tradition has survived colonial rule, Japanese occupation, and the early years of Indonesian independence. Women historically took the lead in producing jamu, while men foraged for the wild plants and roots that went into each recipe. Even today, jamu sellers called “jamu gendong” carry bottles of freshly prepared drinks on their backs through neighborhoods, their hands stained yellow from grinding turmeric that morning.
Common Ingredients
Jamu relies heavily on rhizomes, which are the thick underground stems of plants like turmeric, ginger, and galangal. These form the base of most recipes. From there, ingredients vary widely: tamarind, cloves, fennel, lime, cinnamon, nutmeg, pandan leaf, and dozens of local plants all find their way into different formulations. The ingredients are typically ground fresh, boiled into a decoction, and strained before drinking.
What makes jamu distinctive is that it isn’t a single recipe. It’s an entire system of hundreds of formulations, each designed for a specific purpose. Regional variation is enormous. In Central Java, sweetened turmeric-and-tamarind drinks dominate. In Bali, people drink loloh cem-cem made from hog plum leaves. In the Moluccan islands, kopi rempah blends coffee with nutmeg, clove, and cinnamon.
The Most Popular Formulations
Two jamu recipes stand above the rest in popularity. Kunyit asam combines fresh turmeric with tamarind, creating a tangy, golden drink used as a general health tonic. The tartness of the tamarind balances the earthy bitterness of turmeric, making it one of the more approachable jamu for newcomers.
Beras kencur blends rice with aromatic ginger (a plant called kaempferia galanga, different from regular ginger). It’s traditionally used to relieve tired, aching muscles and to ease coughs and colds. The rice gives the drink a slightly starchy, smooth body that distinguishes it from other jamu.
A third notable variety is jamu pahitan, a deliberately bitter preparation. It combines several bitter plants with turmeric-family rhizomes and is traditionally used in Java for blood sugar management. Laboratory research has shown that its ingredients can stimulate glucose uptake in muscle cells and improve insulin secretion, lending some scientific support to its traditional use.
What Science Says About the Ingredients
Turmeric, the backbone of many jamu recipes, has received the most scientific attention. Its active compound works as a natural anti-inflammatory by blocking several pathways in the body that drive swelling and pain. It interferes with enzymes that produce inflammatory signals and reduces proteins that amplify the inflammatory response.
In one notable clinical trial, 367 patients with knee osteoarthritis were randomly assigned to take either turmeric extract or ibuprofen for four weeks. The turmeric group saw pain and function improvements comparable to ibuprofen. Perhaps more striking, the turmeric group reported significantly fewer episodes of stomach pain and discomfort, a common side effect of ibuprofen.
Galangal, the key ingredient in beras kencur, is traditionally credited with reducing muscle aches. Ginger, another jamu staple, has well-documented effects on nausea and digestion. These individual ingredients have a reasonable body of evidence behind them, though most clinical research has studied isolated extracts at controlled doses rather than the mixed formulations found in a typical glass of jamu.
Jamu for Postpartum Recovery
One of jamu’s most deeply rooted traditions involves postpartum care. In Indonesia, new mothers often undergo a recovery period that includes jamu-based massage treatments. The practice involves a full-body massage with herbal oil, followed by application of a jamu paste on the abdomen and wrapping with a stomach binder.
This treatment is intended to help the uterus return to its pre-pregnancy size, tighten abdominal muscles, ease back pain, and reduce swelling. The binding technique is believed to help reposition internal organs that shifted during pregnancy. Many Indonesian women continue this practice for weeks after giving birth, and similar jamu-based postpartum treatments have gained popularity in Malaysia and Singapore.
How Indonesia Classifies Herbal Medicines
Indonesia has a three-tier regulatory system for herbal products, and understanding it helps make sense of what “jamu” means in a modern context. At the first level, products labeled as jamu are considered safe based on empirical knowledge passed down through generations, but they haven’t undergone formal scientific testing. At the second level, products classified as OHT (standardized herbal medicine) have passed preclinical safety testing, and their raw materials meet standardized quality requirements. At the top tier, phytopharmaceuticals have gone through both preclinical and clinical trials proving their safety and effectiveness.
Most of what you’ll encounter sold as “jamu,” whether from a street vendor or a bottle on a shelf, falls into that first category: traditional knowledge, not clinically validated products.
Safety Concerns Worth Knowing
Fresh jamu made from whole, recognizable ingredients by a trusted seller is generally straightforward. The bigger concern involves packaged or commercially sold jamu products. Indonesian regulators have identified a persistent problem with adulteration, where manufacturers add undisclosed pharmaceutical drugs to traditional medicine products to make them seem more effective. Some of these products have been found to contain banned substances.
Authorities in Thailand and Canada have independently flagged Indonesian traditional medicines containing hidden pharmaceutical ingredients, creating cross-border safety concerns. The Indonesian regulatory agency relies primarily on testing products already on the market rather than screening them before sale, and mandatory product serialization and independent pre-market lab testing are not yet in place. Many problematic products lacked valid registration or used counterfeit authorization numbers.
If you’re buying packaged jamu, look for proper registration from Indonesia’s food and drug authority (BPOM) and purchase from established brands. If you’re trying jamu fresh from a vendor or making it yourself from whole ingredients, the risk of adulteration essentially disappears, and you’re working with kitchen-familiar ingredients like turmeric, ginger, and tamarind.