Ethnomedicinal plants used for digestive system disorders by the Karen of northern ThailandTangjitman K, Wongsawad C, Kamwong K, et al
J Ethnobiol Ethnomed. 2015 Apr 9;11:27
PubMed Central: PMC4422539
Investigators at Chiang Mai University and Royal Park Rajapruek conducted an ethnobotanical study to document plants used by Karen people of Chiang Mai Province, northern Thailand, to treat and prevent digestive system disorders.
The authors open the paper with an introduction of the Karen:
“The Karen originated in Tibet and had migrated to other parts of Southeast Asia, particularly Myanmar. From the 18th century onwards they began to cross the Salween River and moved into Thailand, where they settled in the high mountains of Chiang Mai, Mae Hong Son and Lamphun provinces, as well as other areas. In 2003, the Karen people constituted 48% of the total hill tribe population in the region with a population more than 430,000 Karens in Thailand. As they typically reside in the mountain areas, the Karen people have limited access to public healthcare systems. They have therefore accumulated a rich experience related to preventing and treating diseases with herbal remedies, and they have developed a distinctive knowledge of traditional medicine. This traditional knowledge has been handed down from one generation to the next by spoken word and through lifestyle. Most Karen villagers still maintain traditional knowledge of medicinal plants that are used for first aid remedies and to treat simple ailments.”
The team documented 36 plant species used by the Karen to treat digestive system disorders including diarrhea, flatulence, constipation, gastric ulcer, and jaundice.
The medicinal plant species identified included Curcuma longa, Dendrocalamus strictus, Dillenia pentagyna, Engelhardtia spicata, Euphorbia heterophylla, Gymnopetalum integrifolium, Melastoma malabathricum, Musa sapientum, Psidium guajava, Punica granatum, Senna alata, Senna occidentalis, Zingiber montanum, and Zingiber ottensii.
In their conclusion, the authors recommend further research to determine the biological activities of medicinal plants:
“Digestive system disorders have a high prevalence in terms of the morbidity rate among Thai people. This is also considered to be true worldwide, particularly among ethnic people who likely have inadequate access to hygienic levels of sanitation, which may increase the transmission of digestive diseases. The study of medicinal plants among the Karen people of northern Thailand has reported that 36 species were commonly used against digestive system disorders. A literature investigation found that several surveyed plants had similar usage with other ethnic groups in different areas throughout the world. Moreover, the pharmacological studies of some of the medicinal plants could confirm that these plants are considered effective in treating digestive diseases. However, some medicinal plants, which were reported to have high UV and FL values, still require further pharmacological research for the discovery of new compounds and biological activities of these potential medicinal plants. There were certain toxic effects that were found to have been associated with some of these plants. Therefore, herbal remedies should be taken carefully in order to avoid any potential side effects that may occur through utilizing these medicinal plants.”
Read the complete article at PubMed Central.
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