Xylooligosaccharides (XOS) are prebiotic fibers derived from plant xylose. They pass through the upper digestive system without breaking down. Once they reach the colon, they selectively nourish bacteria such as Bifidobacterium.
Many people take XOS to encourage regularity and ease digestive discomfort. Supporting beneficial gut bacteria can help with occasional bloating and bowel habits. Early findings point to possible effects on immune function and blood sugar control, but those areas need more study.
XOS comes as a powder or capsule. You can stir it into water, tea, or a smoothie. Most users take it daily with or without meals, beginning with a small amount to let the gut adapt.
Higher doses can cause gas, bloating, or loose stools. Anyone with a sensitive bowel or IBS-D should start low and increase slowly. No major drug interactions are reported. See a health professional if you have a digestive condition.