An object of the present invention is to provide a composition for preventing or improving fat deposition on the liver in spite of the alcohol intake history of a level that a liver disease is not caused. The inventors found that glutathione has an effect of preventing or improving fat deposition on the liver, which is not caused by alcohol, and completed the present invention. Among nonalcoholic fat diseases, the present invention is particularly effective in an early stage of the treatment or in a case where treatment for another disease is not performed.
