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Influence of habitual diet on antioxidant status: a study in a population of vegetarians and omnivores

Haldar, S; Rowland, I R; Barnett, Y A; Bradbury, I; Robson, P J; Powell, J; Fletcher, J

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Background: Antioxidant status can be used as a biomarker to assess chronic disease risk and diet can modulate antioxidant defence.Objective: To examine effects of vegetarian diet and variations in the habitual intakes of foods and nutrients on blood antioxidants.Subjects and Setting: Thirty-one vegetarians (including six vegans) and 58 omnivores, non-smokers, in Northern Ireland.Design: A diet history method was used to assess habitual diet. Antioxidant vitamins, carotenoids, uric acid, zinc- and ferric-reducing ability of plasma (FRAP) were measured in fasting plasma and activities of glutathione peroxidase (GPX), superoxide dismutase (SOD) and glutathione S-transferase (GST) and level of reduced glutathione (GSH) were measured in erythrocytes.Results: Vegetarians had approximately 15% higher levels of plasma carotenoids compared with omnivores, including lutein (P< or =0.05), alpha-cryptoxanthin P

Automatic Tags

Female; Male; Adult; Vegetarianism; Prospective Studies; Human; Oxidation-Reduction; Meat; Fruit; Vegetables; Food Habits; Biological Markers -- Blood; Antioxidants -- Administration and Dosage; Antioxidants -- Metabolism; Carotenoids -- Administration and Dosage; Carotenoids -- Blood; Erythrocytes -- Metabolism; Lipid Peroxidation -- Drug Effects

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