#EurycomaLongifolia

In the realm of Thai herbal tradition, few remedies stand as tall—both literally and culturally—as “pla lai puek” (ปลาไหลเผือก), a revered root with centuries of healing lore and, increasingly, mounting scientific interest. Known across the country by a patchwork of regional names—krung badan in Surat Thani, khanang in Trat, and tung sor in the North—this unassuming root from the Eurycoma longifolia Jack shrub, also called tongkat ali throughout Southeast Asia, is at the crossroads of folk wisdom and modern research, offering health-conscious readers a window into how ancient plant knowledge can inspire today’s medical science.