OBJECTIVE: To study the anti - aging effects of KOTAIS on model mice by measuring SOD, GSH - Px, CAT, MDA levels of blood. METHODS : Random groups were prepared by weight for 5 groups and were given normal, D - galactose, and the low and middle and high of KOTAIS. Interrelated senile indexes were measured after successively give medicine for 60 days . RESULTS : Every dose group is able to improve the activities of SOD and GSH - Px and CAT and decrease the level of MDA in blood of all mice. The effects of anti - aging is very obviously for middle dose group. CONCLUSIO...