Type

Journal Article

Authors

Eileen R Gibney
Mike J Gibney
Breige A McNulty
Frank J Monahan
Yang Zhao

Subjects

Medicine & Nursing

Topics
adolescent administration dosage alpha tocopherol gamma tocopherol female dietary supplements vegetables fish oils vitamin e diet nutrition surveys blood vitamins male young adult dietary fats unsaturated butter recommended dietary allowances ireland humans middle aged adult aged

Effect of vitamin E intake from food and supplement sources on plasma α- and γ-tocopherol concentrations in a healthy Irish adult population. (2014)

Abstract Vitamin E is believed to play a preventive role in diseases associated with oxidative stress. The aims of the present study were to quantify vitamin E intake levels and plasma concentrations and to assess dietary vitamin E adequacy in Irish adults. Intake data from the National Adult Nutrition Survey were used; plasma samples were obtained from a representative cohort of survey participants. Plasma α- and γ-tocopherol concentrations were measured by HPLC. The main sources of vitamin E in the diet were 'butter, spreadable fats and oils' and 'vegetables and vegetable dishes'. When vitamin E intake from supplements was taken into account, supplements were found to be the main contributor, making a contribution of 29·2 % to vitamin E intake in the total population. Supplement consumers had significantly higher plasma α-tocopherol concentrations and lower plasma γ-tocopherol concentrations when compared with non-consumers. Consumers of 'vitamin E' supplements had significantly higher vitamin E intake levels and plasma α-tocopherol concentrations compared with consumers of other types of supplements, such as multivitamin and fish oil. Comparison with the Institute of Medicine Estimated Average Requirement of 12 mg/d indicated that when vitamin E intake from food and supplement sources was taken into account, 100 % of the study participants achieved the recommended intake levels. When vitamin E intake from food sources was taken into account, only 68·4 % of the females were found to achieve the recommended intake levels compared with 99·2 % of the males. The results of the present study show that dietary vitamin E intake has a significant effect on plasma α- and γ-tocopherol concentrations. Furthermore, they show that the consumption of supplements is a major contributor to overall intake and has a significant effect on plasma vitamin E concentrations in the Irish population.
Collections Ireland -> University College Dublin -> PubMed

Full list of authors on original publication

Eileen R Gibney, Mike J Gibney, Breige A McNulty, Frank J Monahan, Yang Zhao

Experts in our system

1
Eileen R Gibney
University College Dublin
Total Publications: 98
 
2
Mike Gibney
University College Dublin
Total Publications: 24
 
3
Breige A McNulty
University College Cork
 
4
F.J. Monahan
University College Dublin
Total Publications: 71