Composition for preventing or treating mucositis comprising NecroX as effective ingredient

The present invention relates to a composition for preventing or treating mucositis comprising NecroX. It was found that NecroX has effects of reducing the disease mortality rate by means of radiotherapy or chemotherapy in a NecroX administration group, protecting intestinal functions, inhibiting destruction of intestinal mucous membrane, and proliferating the cells present in intestines. NecroX may be used for a pharmaceutical composition for preventing or treating mucositis, an anti-cancer adjuvant, or a food composition.