#ModernHerbalResearch

Thailand’s markets fill with the scent of som-o, the pomelo, especially during the cool season when large, grapefruit-like fruits line the stalls. Thais enjoy its sweet-tart segments at temple fairs and as merit offerings during New Year. But pomelo peel, the thick aroma-filled layer around the fruit, has long been used in Thai traditional medicine for coughs, swelling, skin issues, and indigestion. How much of this old wisdom holds up under scientific scrutiny? We explore the evidence with respect for heritage and a cautious, critical eye.

Thailand’s markets come alive with the fragrance of som-o, or pomelo, especially during the cool season when its hefty, grapefruit-like fruits are stacked high. Many Thais relish its sweet-tart segments at temple fairs or New Year merit offerings. Yet, the greatness of the pomelo (Citrus grandis (L.) Osbeck)—known locally by names such as โกรัยตะลอง, มะขุน, มะโอ, ลีมาบาลี, and สังอู—extends far beyond the fruit bowl. For centuries, Thai traditional medicine has harnessed the thick, aromatic peel of som-o for remedies thought to ease coughs, swelling, skin woes, and indigestion. But how much of the old wisdom has stood up to scientific inquiry? Today, with both respect for heritage and a critical eye, we explore what research reveals about pomelo peel’s healing promise—and where prudent caution remains essential.