PREBIOTICS are plant based foods that help bacteria within the intestines to balance themselves. This is different than probiotics, a form of cultured dairy. Prebiotics help good bacteria thrive while driving down the number of disease-producing bacteria trying to balance the digestive tract. Fructooligosaccharides (FOS) and inulin are two naturally occurring prebiotics found in many nutritious foods: onions, garlic, leeks, legumes, bananas, asparagus, sunchokes (Jerusalem artichokes), lentils.