Disclosed herein are probiotic bacterial strains or species that produce short chain fatty acids (SCFA), such as butyrate, and compositions comprising the same. The bacterial strains or compositions prepared thereby are used in preparing food, supplements, compositions, and other consumables to provide health benefits, including therapeutic applications, for a variety of disorders, including metabolic, immune, intestinal, and inflammatory disorders. Thus, also disclosed herein are methods of treating a subject suffering from a disorder, such as a metabolic disorder, an immune disorder, an intestinal disorder, or an inflammatory disorder with a composition comprising the probiotic bacterial strains or species disclosed herein. Uses of a bacterial strain or species and a composition comprising them provided in a nutritional product or medicament to improve health or prevent or treat a variety of disorders in a subject are also disclosed.