Marshmallow Root for Digestive Health

Research suggests that marshmallow root may support digestive health through several overlapping mechanisms, including gastroprotective effects, antioxidant activity, intestinal barrier support, and compatibility with beneficial probiotic bacteria. The available evidence comes primarily from animal studies and laboratory cell culture experiments, with two rat studies finding that marshmallow root extracts reduced drug-induced ulcer formation and associated oxidative stress at levels comparable to pharmaceutical reference drugs, while cell-based studies suggest the root's polysaccharides may actively promote epithelial cell repair and help preserve gut barrier integrity rather than simply acting as a passive coating. Studies indicate that marshmallow root also appears compatible with — and in some cases supportive of — probiotic bacteria under simulated digestive conditions, and that it can be incorporated into functional food products without substantially affecting quality. Importantly, no randomized controlled trials or human clinical studies are represented in this body of evidence, which means findings cannot yet be directly extrapolated to human outcomes, and the overall research base, while consistently directionally supportive, remains preliminary.