Probiotics are foods or supplements that contain live micro-organisms intended to maintain or improve the "good" bacteria (normal microflora) in the body. Prebiotics are foods (typically high-fiber foods) that act as food for human microflora.
Prebiotics may support a healthy gut, offering better digestive health, fewer antibiotic-related health problems, and other benefits. There is less research on prebiotics than on probiotics. As a result, the extent to which prebiotics improve health is unclear