FOS are short-chain soluble fibers found in bananas, onions, and garlic. Manufacturers isolate or synthesize them for prebiotic supplements.
FOS serves as food for friendly gut bacteria. This promotes regular bowel movements and healthy gut function. Many people take it to enhance mineral absorption.
Mix one daily dose into water or another drink. Take it with a meal, or follow the label directions. Start with a small amount to reduce gas or bloating.
FOS can cause gas, bloating, or diarrhea, particularly when you begin or take large amounts. If you have irritable bowel syndrome (IBS) and react to FODMAPs, use FOS carefully.