#BotanicalWisdom

For centuries, the slender, aromatic rhizomes of Acorus calamus—known across Thailand as ว่านน้ำ—have held a treasured place in local medicine cabinets and cultural rituals. Revered for its purported healing properties and deep-rooted cultural importance, this remarkable wetland plant (often called “sweet flag” in English) draws an intriguing bridge between ancestral knowledge and evolving scientific research. As interest in herbal remedies continues to rise among health-conscious Thais, understanding both the promise and the complexities of Acorus calamus is more vital than ever.