Probiotics is the term used to indicate specific digestive bacteria that produce healthy intestinal flora. Bacteria such as bifidobacteria, lactobacilli, bacteroides and fusobacteria are some examples of probiotics. Probiotics utilize beneficial bacteria to support the health of the gastrointestinal system by suppressing the growth of, or destroying undesirable bacteria. The regular use of probiotics can re-colonize the gastrointestinal tract with enough normal flora to prevent potentially damaging microbes from gaining dominance. Researchers from the Johns Hopkins 2003 study evaluating probiotic use to improve NAFLD suggested the inclusion of probiotics in a plan to prevent additional accumulation of fat in the liver.