en Nutrition Nutrition Original Research Original Research <p> <strong> Abstract </strong></p><p> <strong> Background: </strong>obesity is directly related to dyslipidemia which contributes significantly </p><p>  to the risk of coronary heart disease, a major cardiovascular disease and a serious </p><p>  health problem. The aim of this study was to compare the effects of low calorie </p><p>  diet and those of lovastatin on serum lipoproteins, apo B, homocysteine, and total antioxidant capacity (TAC) in hyperlipidemic obese patients. </p><p> <strong> Methods: </strong>In a randomized clinical trial, 41 obese patients were stratified by BMI, </p><p>  serum triglyceride (TG) and total cholesterol (TC) and randomly allocated to one of </p><p>  these groups: 1- Lovastatin tablet (40mg) 2-1200 calorie diet per day according to the </p><p>  therapeutic lifestyle change (TLC) dietary pattern for 8 weeks. Serum lipoprotein, </p><p>  apo B, homocysteine, and TAC were measured enzymatically, immunoturbidometrically, </p><p>  via EIA , and colorimetrically respectively. </p><p> <strong> Results: </strong>There were a significant decrease in mean of the serum TC (P=0.0001), </p><p>  LDL- c(p=0.0001), TG/HDL-c(p=0.03), apoB (p=0.0001) and significant increase </p><p>  in TAC (p=0.0001) in diet group at the end of the study compare to lovastatin group. </p><p>  TC, LDL-c, TG, LDL-c/HDL-c , TC/HDL-c , TG/HDL-c, homocysteine and apo B </p><p>  showed significant decrease but TAC showed significant increase in the diet group at </p><p>  the end of the study compared to beginning values (p=0.0001, p=0.0001, p=0.0001, </p><p>  p=0.001, p=0.0001, p=0.0001, p=0.0001, p=0.0001 and p=0.002, respectively). But </p><p>  in the lovastatin group only TC, LDL-C, TG, LDL-c/HDL-c, TC/HDL-c and apo B </p><p>  had significant decrease at the end of the study compared to beginning values </p><p>  (P=0.0001, P=0.0001, P=0.0001, P=0.01, P=0.02, P=0.002, respectively) </p><p> <strong> Conclusion: </strong>The study revealed that when compared to levostation 1200 kcal diet </p><p>  according to TLC dietary pattern had more beneficial effects on serum lipoproteins, </p><p>  apo B, homocysteine and TAC, so it may decrease CVD risk factors and mortality </p><p>  in hyperlipidemic obese patients. </p> obesity, lipoprotein, lovastatin, low calorie diet, apo B. 14 22 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-35&slc_lang=en&sid=1 Farzad Shidfar farzadshidfar@yahoo.com 20031947532846001749 20031947532846001749 Yes School of Health, Iran University of Medical Sciences. Javad Haji Miresmail 20031947532846001750 20031947532846001750 No School of Medicine, Iran University of Medical sciences, Tehran, Iran. Sharieh Hosseini 20031947532846001751 20031947532846001751 No Islamic Azad University, Sari Branch, Sari, Iran. Shahrzad shidfar 20031947532846001752 20031947532846001752 No University of Massachausetts, Memorial Hospital,Worcester, USA. Reza Homayonfar 20031947532846001753 20031947532846001753 No ,School of Health, Iran University of Medical Sciences,Tehran, Iran.