FiberAid is a unique soluble fiber that offers superior benefits for gastrointestinal health combined with excellent digestive tolerance. It's processed without additivesl. Swanson FiberAid Larch Tree Arabinogalactan (Ag) is a soluble prebiotic fiber dietary supplement designed to support digestive health and promote healthy microflora in the gut. Made with FiberAid, a larch tree-derived arabinogalactan, this science-backed formula helps nourish beneficial intestinal bacteria and assists with occasional constipation while offering excellent digestive tolerance. The powder is processed without additives and mixes easily into beverages, virtually disappearing without adding flavor or odor. It does not settle in cold drinks or clump in hot drinks, making it a convenient addition to daily wellness routines.