In order to determine the lipids and lipoproteins profiles in Iranian khouzestanian Arab horses, blood samples were collected from the jugular vein of 77 horses(47 female, 30 male) from different age groups(< 6, 7-12, 12-36, 37-60, 61- 69 and > 96 months). serum cholesterol and triglyceride were measured by enzymatic methods and lipoproteins by precipitation methods. The results were analyzed by LSD and t - test. Regardless of sex and age, the mean values of total cholesterol(TC), total triglyceride(TG), very low density lipoprotein cholesterol(VLDL-c), low density lipoprotein cholesterol(LDL-c), high density lipoprotein cholesterol(HDL-c) were 71.10 ± 1.25, 26.05 ± 0.64, 10.91± 0.67, 22.71± 3.74 and 37.61 ± 1.24 mg/dl, respectively.Statistical analysis showed that there was no difference
between female and male ones. However, age had a significant effect on LDL-c concentration so that its value decreased with increase in age. The present study revealed that the normal concentrations of lipids and lipoproteins in Iranian Khouzestanian Arab horses differt from the other breeds and those Arabian horses which live in the other areas. This difference may be due to the effect of breed,nutrition, various physiological and climatic conditions.