Cells exposed to ultraviolet light were given NKG Kefir for 3 hours after irradiation only in the upper row. Then, we observed the cells one day, two days, and four days later. As a result, it was found that cells given NKG kefir were repaired from damage over time and were steadily increasing. NKG Kefir has been found to have the effect of repairing and recovering cells from damage caused by ultraviolet light.