Aim: The aim of this research was to determine the effects of separate and combination use of sage and laurel oils in quail diets at different levels on serum and breast meat oxidantantioxidant balance and on some serum biochemical parameters.

Materials and Methods: A total of 800 mixed gender Japanese quails (Coturnix coturnix japonica) were used in the study. The quail were divided into 10 groups each containing of 80 quails. The control group was fed with basic diet. Experimental groups were formed by adding 100, 200 and 400 mg/kg of sage oil; 100, 200 and 400 mg/kg of laurel oil, and 100, 200 and 400 mg/kg of sage oil+laurel oil mixture into the basic diet, respectively. The experiment was lasted for 5 weeks.

Results: It was observed that serum and breast meat malondialdehyde level decreased in 400 mg/kg of laurel group, and laurel oil caused a linear effect on serum and breast meat malondialdehyde level and serum antioxidant activity. Serum triglycerides, total protein, cholesterol, alkaline phosphatase, alanine aminotransferase and aspartate aminotransferase levels were determined not to change in the experimental groups (P>0.05).

Conclusion: It may be stated that the addition of laurel oil in quail diets suppressed oxidative stress by increasing serum oxidant activity.