Cytoprotective agent

摘要

An object of the present invention is to find a novel and useful component in a culture supernatant of a lactic acid bacterium and to provide an effective utilization method of the component. The utilization method is a cytoprotective agent containing, as an active ingredient, a low-molecular-weight fraction in a culture supernatant of a lactic acid bacterium belonging to Streptococcus thermophilus.