Thyme is a plant native to Iran that is widely found in southern part and mountainous center of country and has antibacterial and antifungal activity on digestive and chronic diseases in traditional medicine. However the medicinal species is called Thyme vulgaris, all of the Thyme are enriched with volatile compounds including thymol and carvacrol acting as strong antiseptic. In present study we decided on evaluating the effect of thyme essence on biochemical factors such as (triglyceride, cholesterol, HDL, LDL, ALT, AST and total protein) in rat's blood serum. Thyme essences in 200 and 400 mg/kg levels were prescribed respectively for animals in two treatment group through oral administration during 21 days and the third group as control received no compositions. It was observed that after measuring biochemical factors of blood serum the thyme essences led to decrease cholesterol level significantly in both treatment groups compared with control group (p< 0.05).
