A composition containing a Lactobacillus pentosus TUA4337L strain (accession number: NITE BP-1479), characterized in that the strain has proliferation ability in the small intestines and/or the large intestine, and preferably the small intestines, after having survived in the intestinal tract. Since the composition of the present invention contains lactic acid bacteria having proliferation ability in the intestinal tract, when ingested in the body, the lactic acid bacteria survive to the intestinal tract and proliferate, whereby the fat absorption can be blocked, and the weight gains can be blocked, so that the composition can be suitably used for the purposes of dieting effects.
