Jamu: The Ancient Indonesian Art of Herbal Healing. Susan-Jane Beers
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In 1981, the government set up eight designated herbal medicine testing centres for the development and application of traditional medicine in Java, Sulawesi, Sumatra and Bali. Their brief was the scientific study of commercially manufactured products, with a view to ascertaining whether their healing claims were valid or not. At present, the centres employ two methods of testing. The first deals with the bioactive screening of crude and fractioned extracts. The second, which is called the chemical approach, includes step-by-step experiments that extract, separate, isolate and purify ingredients; the process is technically described as structural elucidation, theoretical deduction of bioactivity and pharmacological testing. It is believed that such trials will bring scientific credibility to a subject that has—up to now— been cloaked in mystery.
Jamu was given further credibility in the late 1980s when an investigative centre opened in Yogyakarta, home of traditional medicine. In answer to popular requests for research and analysis of jamu, Professor Dr Koesnadi Hardjasoemantri, then Director of Gadjah Mada University, set up the Research Centre for Traditional Medicine at the university. The Centre’s task is to evaluate traditional medicine, produce experimental batches, train jamu technical staff and develop raw materials. In addition, it now includes massage and acupuncture in its brief. The Centre has also adopted an educational role and operates courses on jamu making in villages throughout Central Java to help small producers improve hygiene and quality.
A Fair Trial
Clinical trials have been implemented in Indonesia, but it is a complex, Herculean task. Not only can a jamu formula consist of 40 or more ingredients, but each may contain a dozen or more chemical components. In addition to the active ingredients, there are secondary, inactive items, used to render the medicine palatable or to mask unpleasant odours. And, as Professor Sutarjadi, founder of Post-Graduate Studies at the University of Airlangga in Surabaya, points out, ingredients from different parts of Java will probably have different properties as soil, climate and altitude differ radically from one area to another.
In terms of manpower and economic resources, the task of analysing and qualifying jamu ingredients and formulæ is colossal. Detractors argue that the industry should not be burdened with such extra requirements when most Indonesians have accepted jamu at face value for centuries. To simplify research, the Indonesian Ministry of Health introduced a new ruling in the late 1990s under the heading ‘Phytopharmaca’, which loosely translates as ‘Active Plant Ingredients’.
IBU RISMA AND THE ROSY PERIWINKLE
Cancer is a fast-growing disease in Indonesia with over 190,000 new patients recorded each year. Twenty-eight year old Risma Abednego was told she had cancer, a fist-sized tumour in her womb, and her only chance was an operation—one she rejected. She was encouraged to seek out Bapak Soetijono Darsosentono, a traditional healer in Yogyakarta, who specialized in curing cancer.
He gave her traditional medicine consisting of dried benalu (Loranthes sp.) and tapak dara (rosy or Madagascar periwinkle; Catharanthus roseus) leaves. He told her to clean the leaves, boil them and drink the water. She was to repeat the process with betel nut leaves. Smoking, drinking, and the consumption of preserved, instant, spicy and sour foods, as well as lamb and seafood, were all banned. For nine months, Risma consumed large amounts of soya in the form of tempe or tofu, before returning to her doctor for a check-up. He noticed a great improvement. Eighteen months later he pronounced her completely cured.
Patients treated by Bapak Soetijono Darsosentono are urged to continue taking the medicine every day for five years. Risma developed cancer over 10 years ago but still drinks the healing brew as an insurance policy and everyone in the house follows her healthy diet. Not surprisingly, she has become an enthusiastic supporter of traditional medicine.
This ruling requires that commercial producers reduce complicated formulæ for every curing jamu to five essential ingredients in order to simplify testing. It also requires producers to standardize the active substance in each ingredient. However, a lack of information as to how traditional herbs were originally prepared hinders clarification. The government directive also states that clinical trials for both medical drugs and traditional medicine must be conducted to the same criteria; these are costly at the best of times, all the more so for jamu products which have a comparatively low retail price.
As a concession to this expense, the government has announced that clinical trials may be carried out at Sentra P3T (the Research Centre for the Development and Application of Traditional Treatments) which has the authority to legally authenticate any claims proven during official tests. Although fees for trials here are less expensive than medical drug clinical trials, the cost of this service is still considered beyond most budgets. Results from clinical trials that have been undertaken highlight another important factor of jamu: its versatility. Any one ingredient can be a base ingredient for a formula that addresses a wide range of complaints.
Doctors at Sentra P3T have conducted a number of preliminary clinical trials on selected remedies. The list includes garlic (bawang putih; Allium sativum) for hypertension; caricature plant (handeuleum; graptophyllum pictum) for haemorrhoids; guava leaves (jambu biji; psidium guajava) for diarrhoea; round turmeric (temu lawak; curcuma xanthorrhiza) for chronic hepatitis and osteoarthritis; cashew nut fruit (kacang mede; Anacardium occidentale) to reduce pain in acute toothache; and pare fruit or bitter gourd (momordica charantia) to treat diabetes mellitus.
The Research Centre for Traditional Medicine in Yogyakarta has also completed the first phase of a study to evaluate the effect of cashew nut leaves in treating rheumatoid arthritis and hypertension. Similar work is being carried out on turmeric (kunir; curcuma domestica) and its potential to cure ulcers, and to confirm whether the juice of bitter gourd can help diabetes sufferers. In addition, the research programme is studying dosages, especially as regards Westerners, who may need smaller quantities than people who have taken herbal medicines from birth.
In the early 1990s, the Toray Foundation in Bandung carried out a scientific study to find out whether the very popular product, Pegal Linu (see page 10) had any positive effect on the health of becak (trishaw) drivers whose complaints included aches, pains, rheumatics and fatigue. Pegal Linu is composed of, amongst other things, turmeric, ginger, galangal and pepper. The investigating team concluded that it made a substantial difference to the drivers, as it restored energy and reduced muscular pain significantly.
Assuming scientists manage, despite all the obstacles, to complete their experiments and publish their findings, they are more than likely to face a barrage of abuse from the various jamu companies who protest that competitors will steal the formulæ if results list chemical components. Yet, notwithstanding all these difficulties, the government continues with its testing programmes, owing to an increasing awareness of the export potential of the country’s myriad jamu products.
The Professional Viewpoint
For Indonesians, Western medicine is a recent and expensive phenomenon. Not only are allopathic drugs and ointments well beyond the pocket of the average Indonesian, but they are not a tempting alternative to jamu which has been used successfully for generations.
Although there are detractors who consider herbal medicine ineffective, jamu is gaining ground. There is no doubt that jamu mixtures are full of active, natural ingredients such as vitamins A, C and E, all of which contribute to overall well-being. Indeed many of the barks, leaves, roots, stems, flowers, seeds and minerals used come straight from the country’s tropical rainforests, where there is no pollution or pesticides and hence are at their purest and most potent.
The accusation that jamu is ‘not scientifically proven’ is still often made by the medical profession. Perhaps it is not proven in the same terms as we expect from Western medicine, but the results speak for themselves. The medical profession should note that without the benefit of expensive modern products, Javanese women are amazingly well preserved despite having given birth to large families. Unlike their Western counterparts, who often remain overweight after giving birth, Indonesian mothers