title: Effect of vitamin C supplementation on postprandial oxidative stress and lipid profile in type 2 diabetic patients.
abstract: Diabetes mellitus is one of the most wide spread endocrine disorders and an important developing health problem in the world. Cardiovascular disease is a common complication of type 2 diabetes. Several risk factors for coronary heart disease cosegregate in type 2 diabetes, including hyperglycemia, hyperlipaemia, increases production of free radical and decrease in antioxidant defense system. In this study we evaluated the effect of vitamin C supplementation on fasting and postprandial oxidative stress and lipid profile in type 2 diabetic patients. 30 patients with type 2 diabetes from Nader Kazemi Clinic, Shiraz, Iran were randomly divided into 2 groups; vitamin C treatment group (1000 mg d(-1)) and placebo group from May to September 2010. Fasting and postprandial lipid profile and Malondialdehyde (MDA) level were measured at the beginning of the study and after six weeks of supplementation. Data analysis was carried out using Mann-Whitney U test with p < 0.05 being significant by SPSS software version 16.The result of the study showed a significantly decrease in fasting (p = 0.006) and postprandial MDA (p < 0.001) in vitamin C group compare to placebo group but not in lipid profile. This study suggests that vitamin C supplementation can decrease fasting and postprandial oxidative stress and may prevent diabetes complication.
authors.affiliation: Department of Nutrition, School of Health and Nutrition, Shiraz University of Medical Sciences, Shiraz, Iran.
authors.forename: Zohreh
authors.initials: Z
authors.lastname: Mazloom
authors.forename: Najmeh
authors.initials: N
authors.lastname: Hejazi
authors.forename: Mohammad-Hossein
authors.initials: MH
authors.lastname: Dabbaghmanesh
authors.forename: Hamid-Reza
authors.initials: HR
authors.lastname: Tabatabaei
authors.forename: Afsane
authors.initials: A
authors.lastname: Ahmadi
authors.forename: Hasti
authors.initials: H
authors.lastname: Ansar
mesh_terms: D000328:Adult; D000368:Aged; D001205:Ascorbic Acid / Q000494:pharmacology*; D048909:Diabetes Complications / Q000097:blood / Q000517:prevention & control*; D003924:Diabetes Mellitus, Type 2 / Q000097:blood* / Q000188:drug therapy*; D019587:Dietary Supplements; D005215:Fasting / Q000097:blood; D005260:Female; D006801:Humans; D007492:Iran; D050356:Lipid Metabolism / Q000187:drug effects*; D008297:Male; D008875:Middle Aged; D018384:Oxidative Stress / Q000187:drug effects*; D019518:Postprandial Period / Q000187:drug effects*; D016037:Single-Blind Method
chemical_list: D001205:Ascorbic Acid