#Knemaangustifolia

For generations, the robust trees of Knema angustifolia—known in Thai as กำลังเลือดม้า (gamlang lueat ma) or sometimes as ประดงเลือด, and in English by its scientific name—have quietly offered their bark to folk healers across Thailand’s countryside. Local herbalists, passed down wisdom through word of mouth, have prized its blood-red sap for its reputed power to invigorate blood, fortify the body in times of weakness, and ease various ailments. Today, as the world looks anew at traditional remedies, a new chapter is being written for this storied botanical, reaching from Lanna village clinics to the cutting-edge labs of modern phytochemistry and pharmacology.

For generations, Thai communities have trusted the bark of Knema angustifolia, known locally as กำลังเลือดม้า (gamlang lueat ma) and sometimes as ประดงเลือด, as a traditional tonic. Folk healers described its red sap as a source of vitality, used to strengthen the body during weakness and to support recovery from illness. Today, researchers are revisiting this tree to understand its potential through contemporary phytochemistry and pharmacology, connecting village practices with modern science.