FiberMend Prebiotic Fiber PowderThorne FiberMend combines partially hydrolyzed guar gum (PHGG) with inulin from chicory root to support GI motility, regularity, and healthy gut microbiome balance. PHGG is a soluble fiber with exceptionally low viscosity that dissolves completely without gelling unlike psyllium husk which creates a thick texture. Clinical studies on PHGG show benefits for IBS symptoms, gut transit time, and beneficial bacterial populations without the bloating