## How do probiotics work? __Probiotics__ are strains of live bacteria and yeast that live primarily in the gut. They help rid the body of harmful bacteria and yeast so that the digestive system functions properly. __What are good sources of probiotics?__ Yogurt, kefir, sour milk, some kinds of cheese, cottage cheese, and kimchi contain probiotics. Probiotics are also available in the form of dietary supplements. ## How do prebiotics work? __Prebiotics__ are components of food that are not digested in the upper gastrointestinal tract but help the human intestinal microflora by stimulating its growth and vitality. They are essentially food for probiotics. Humans don't have the enzymes needed to break down these foods. Instead, bacteria in the gut break them down for energy, stimulating reproduction and producing potentially healthy byproducts. Prebiotics include various amino acids, enzymes, saccharides, and antioxidants such as inulin, pectin, lactose, and lactulose, as well as dietary fiber. __What are good sources of prebiotics?__ Dairy and fermented dairy products, cereals and legumes, some fruits and vegetables, nuts, and bitter chocolate contain prebiotics. Food supplements and medical complexes are made based on inulin, lactose, and other prebiotics. ## Why take probiotics and prebiotics? Getting enough probiotics and prebiotics supports digestive health, the immune system, nutrient absorption, skin health, and more. Both should be used routinely as part of a healthy, sustainable diet to prevent disease, and the intake of both can be reinforced during times of illness.