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Influence of habitual diet on antioxidant status: a study in a population of vegetarians and omnivores.
Eur J Clin Nutr 2007; 61(8):1011-22EJ

Abstract

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< or =0.05), lycopene (NS), alpha-carotene (NS) and beta-carotene (NS). The levels/activities of all other antioxidants measured were similar between vegetarians and omnivores. Total intake of fruits, vegetables and fruit juices was positively associated with plasma levels of several carotenoids and vitamin C. Intake of vegetables was positively associated with plasma lutein, alpha-cryptoxanthin, alpha-carotene and beta-carotene, whereas intake of fruits was positively associated with plasma beta-cryptoxanthin. Intake of tea and wine was positively associated with FRAP value, whereas intake of herbal tea associated positively with plasma vitamin C. Intakes of meat and fish were positively associated with plasma uric acid and FRAP value.

CONCLUSIONS

The overall antioxidant status was similar between vegetarians and omnivores. Good correlations were found between intakes of carotenoids and their respective status in blood.

Authors+Show Affiliations

Northern Ireland Centre for Food and Health (NICHE), School of Biomedical Sciences, University of Ulster, Coleraine, County Londonderry, UK. s.haldar@ulster.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17299498

Citation

Haldar, S, et al. "Influence of Habitual Diet On Antioxidant Status: a Study in a Population of Vegetarians and Omnivores." European Journal of Clinical Nutrition, vol. 61, no. 8, 2007, pp. 1011-22.
Haldar S, Rowland IR, Barnett YA, et al. Influence of habitual diet on antioxidant status: a study in a population of vegetarians and omnivores. Eur J Clin Nutr. 2007;61(8):1011-22.
Haldar, S., Rowland, I. R., Barnett, Y. A., Bradbury, I., Robson, P. J., Powell, J., & Fletcher, J. (2007). Influence of habitual diet on antioxidant status: a study in a population of vegetarians and omnivores. European Journal of Clinical Nutrition, 61(8), pp. 1011-22.
Haldar S, et al. Influence of Habitual Diet On Antioxidant Status: a Study in a Population of Vegetarians and Omnivores. Eur J Clin Nutr. 2007;61(8):1011-22. PubMed PMID: 17299498.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of habitual diet on antioxidant status: a study in a population of vegetarians and omnivores. AU - Haldar,S, AU - Rowland,I R, AU - Barnett,Y A, AU - Bradbury,I, AU - Robson,P J, AU - Powell,J, AU - Fletcher,J, Y1 - 2007/02/14/ PY - 2007/2/15/pubmed PY - 2007/11/2/medline PY - 2007/2/15/entrez SP - 1011 EP - 22 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 61 IS - 8 N2 - 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< or =0.05), lycopene (NS), alpha-carotene (NS) and beta-carotene (NS). The levels/activities of all other antioxidants measured were similar between vegetarians and omnivores. Total intake of fruits, vegetables and fruit juices was positively associated with plasma levels of several carotenoids and vitamin C. Intake of vegetables was positively associated with plasma lutein, alpha-cryptoxanthin, alpha-carotene and beta-carotene, whereas intake of fruits was positively associated with plasma beta-cryptoxanthin. Intake of tea and wine was positively associated with FRAP value, whereas intake of herbal tea associated positively with plasma vitamin C. Intakes of meat and fish were positively associated with plasma uric acid and FRAP value. CONCLUSIONS: The overall antioxidant status was similar between vegetarians and omnivores. Good correlations were found between intakes of carotenoids and their respective status in blood. SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/17299498/Influence_of_habitual_diet_on_antioxidant_status:_a_study_in_a_population_of_vegetarians_and_omnivores_ L2 - http://dx.doi.org/10.1038/sj.ejcn.1602615 DB - PRIME DP - Unbound Medicine ER -