scholarly journals Evaluation of an FFQ for assessment of antioxidant intake using plasma biomarkers in an ethnically diverse population

2009 ◽  
Vol 12 (12) ◽  
pp. 2438-2447 ◽  
Author(s):  
Allison M Hodge ◽  
Julie A Simpson ◽  
Masha Fridman ◽  
Kevin Rowley ◽  
Dallas R English ◽  
...  
Keyword(s):  
Vitamin E ◽  
Plasma Concentrations ◽  
Correlation Coefficients ◽  
Fruit And Vegetables ◽  
Dietary Vitamin ◽  
Melbourne Collaborative Cohort Study ◽  
Plasma Retinol ◽  
The Uk ◽  
Plasma Antioxidant ◽  
Β Carotene

AbstractObjectiveTo evaluate FFQ estimates of dietary intake of individual antioxidants, fruit and vegetables in comparison to plasma concentrations of each antioxidant, and to determine which individual foods are associated with plasma antioxidant concentrations.DesignDietary (α-carotene, β-carotene, β-cryptoxanthin, lutein/zeaxanthin, lycopene, retinol, and vitamin E) intakes over 12 months were estimated from a 121-item FFQ. Correlation coefficients, corrected for within-person variability in diet and plasma antioxidants, were used to examine associations between antioxidant concentrations in diet and plasma.SettingMelbourne Collaborative Cohort Study (MCCS).SubjectsMen and women (n3110) who were randomly selected from the MCCS. Participants were aged 36–72 years and were born in Australia, Greece, Italy or the UK.ResultsCorrelation coefficients for the carotenoids ranged from 0·28 for lycopene to 0·46 for β-cryptoxanthin. There was no association between dietary and plasma retinol or dietary vitamin E with plasma α- and γ-tocopherol. Individual plasma carotenoid concentrations were associated with intakes of fruit and vegetables.ConclusionsOur data suggest that the FFQ provides useful information on intakes of each of the carotenoids: α-carotene, β-carotene, β-cryptoxanthin, lycopene and lutein/zeaxanthin. There was no association between diet and plasma markers of retinol or vitamin E; this may reflect the importance of factors other than intake in modifying circulating levels of these nutrients.

scholarly journals Biochemical Validation of a Self-Administered Food Frequency Questionnaire to Assess Diet Using Carotenoids and Vitamins E and D in Male Adolescents in Spain

Antioxidants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 750
Author(s):  
Leyre Notario-Barandiaran ◽  
Eva-María Navarrete-Muñoz ◽  
Desirée Valera-Gran ◽  
Elena Hernández-Álvarez ◽  
Encarnación Donoso-Navarro ◽  
...  
Keyword(s):  
Vitamin E ◽  
Food Frequency Questionnaire ◽  
Vegetable Intake ◽  
Correlation Coefficients ◽  
Fruit And Vegetable Intake ◽  
Fruit And Vegetable ◽  
Sample Mean ◽  
Food Frequency ◽  
Male Adolescents ◽  
Β Carotene

Reliable tools to evaluate diet are needed, particularly in life periods such as adolescence in which a rapid rate of growth and development occurs. We assessed the biochemical validity of a self-administered food frequency questionnaire (FFQ) in a sample of Spanish male adolescents using carotenoids and vitamin E and D data. We analyzed data from 122 male adolescents aged 15–17 years of the INMA-Granada birth cohort study. Adolescents answered a 104-item FFQ and provided a non-fasting blood sample. Mean daily nutrient intakes and serum concentration were estimated for main carotenoids (lutein-zeaxanthin, β-cryptoxanthin, lycopene, α-carotene and β-carotene), vitamins E and D and also for fruit and vegetable intake. Pearson correlation coefficients (r) and the percentage of agreement (same or adjacent quintiles) between serum vitamin concentrations and energy-adjusted intakes were estimated. Statistically significant correlation coefficients were observed for the total carotenoids (r = 0.40) and specific carotenoids, with the highest correlation observed for lutein–zeaxanthin (r = 0.42) and the lowest for β-carotene (0.23). The correlation coefficient between fruit and vegetable intake and serum carotenoids was 0.29 (higher for vegetable intake, r = 0.33 than for fruit intake, r = 0.19). Low correlations were observed for vitamin E and D. The average percentage of agreement for carotenoids was 55.8%, and lower for vitamin E and D (50% and 41%, respectively). The FFQ may be an acceptable tool for dietary assessment among male adolescents in Spain.

scholarly journals Effect of vitamin E intake from food and supplement sources on plasma α- and γ-tocopherol concentrations in a healthy Irish adult population

2014 ◽  
Vol 112 (9) ◽  
pp. 1575-1585 ◽  
Author(s):  
Yang Zhao ◽  
Frank J. Monahan ◽  
Breige A. McNulty ◽  
Mike J. Gibney ◽  
Eileen R. Gibney
Keyword(s):  
Vitamin E ◽  
Adult Population ◽  
Plasma Concentrations ◽  
Fats And Oils ◽  
Food Sources ◽  
Dietary Vitamin ◽  
Plasma Vitamin ◽  
Institute Of Medicine ◽  
Nutrition Survey ◽  
Plasma Vitamin E

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.

scholarly journals Plasma retinol, β-carotene and vitamin E levels in relation to the future risk of breast cancer

1984 ◽  
Vol 49 (3) ◽  
pp. 321-324 ◽  
Author(s):  
N J Wald ◽  
J Boreham ◽  
J L Hayward ◽  
R D Bulbrook
Keyword(s):  
Breast Cancer ◽  
Vitamin E ◽  
The Future ◽  
Future Risk ◽  
Plasma Retinol ◽  
Β Carotene

scholarly journals Changes in plasma antioxidant status following consumption of diets high or low in fruit and vegetables or following dietary supplementation with an antioxidant mixture

2001 ◽  
Vol 85 (4) ◽  
pp. 459-464 ◽  
Author(s):  
Ian R. Record ◽  
Ivor E. Dreosti ◽  
Jennifer K. McInerney
Keyword(s):  
Antioxidant Status ◽  
Fruits And Vegetables ◽  
Plasma Concentrations ◽  
Fruit And Vegetables ◽  
Depletion Period ◽  
Dried Extract ◽  
Plasma Antioxidant ◽  
Dietary Treatments ◽  
Antioxidant Diet ◽  
Spray Dried

The aim of the present study was to examine the effect of consumption of a high-fruit and vegetable diet, or a spray-dried extract of selected fruits and vegetables of high antioxidant content, on indices of antioxidant status of individuals consuming a background diet with minimal antioxidant intake. Plasma antioxidant concentrations were determined in twenty-five men following a 2-week depletion period during which they consumed self-selected low-antioxidant diets (less than three servings of fruit and vegetables with no tea, coffee, red wine or fruit juice). Following this period the volunteers consumed either a self-selected diet containing five to seven servings of fruit and vegetables/d, or 30 g of a spray-dried supplement designed to provide the equivalent antioxidant activity of five to seven servings of fruit and vegetables for 2 weeks in a crossover trial. Following consumption of a high-antioxidant diet for 2 weeks, plasma concentrations of ascorbic acid, α- and β-carotene and lutein+zeaxanthin were all significantly increased (P<0.05) over the depletion period. However, concentrations of lycopene, retinol and tocopherol were not affected. Consumption of the supplement also raised the concentrations of these same antioxidants in plasma. Despite the increases in the concentrations of measured antioxidant nutrients, the 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid-equivalent antioxidant capacity of plasma, as estimated by inhibition of metmyoglobin activity, was not significantly affected by any of the dietary treatments.

scholarly journals Dietary vitamin and carotenoid intake and risk of age-related cataract

2019 ◽  
Vol 109 (1) ◽  
pp. 43-54 ◽  
Author(s):  
Hong Jiang ◽  
Yue Yin ◽  
Chang-Rui Wu ◽  
Yan Liu ◽  
Fang Guo ◽  
...  
Keyword(s):  
Vitamin E ◽  
Vitamin A ◽  
Vitamin C ◽  
Cohort Studies ◽  
Dose Response ◽  
Meta Analysis ◽  
Dietary Vitamin ◽  
Age Related ◽  
Β Carotene ◽  
Reduced Risk

ABSTRACT Background Existing studies suggest that dietary vitamins and carotenoids might be associated with a reduced risk of age-related cataract (ARC), although a quantitative summary of these associations is lacking. Objectives The aim of this study was to conduct a meta-analysis of randomized controlled trials (RCTs) and cohort studies of dietary vitamin and carotenoid intake and ARC risk. Methods The MEDLINE, EMBASE, ISI Web of Science, and Cochrane Library databases were searched from inception to June 2018. The adjusted RRs and corresponding 95% CIs for the associations of interest in each study were extracted to calculate pooled estimates. Dose-response relations were assessed with the use of generalized least-squares trend estimation. Results We included 8 RCTs and 12 cohort studies in the meta-analysis. Most vitamins and carotenoids were significantly associated with reduced risk of ARC in the cohort studies, including vitamin A (RR: 0.81; 95% CI: 0.71, 0.92; P = 0.001), vitamin C (RR: 0.80; 95% CI: 0.72, 0.88; P < 0.001), vitamin E (RR: 0.90; 95% CI: 0.80, 1.00; P = 0.049), β-carotene (RR: 0.90; 95% CI: 0.83, 0.99; P = 0.023), and lutein or zeaxanthin (RR: 0.81; 95% CI: 0.75, 0.89; P < 0.001). In RCTs, vitamin E (RR: 0.97; 95% CI: 0.91, 1.03; P = 0.262) or β-carotene (RR: 0.99; 95% CI: 0.92, 1.07; P = 0.820) intervention did not reduce the risk of ARC significantly compared with the placebo group. Further dose-response analysis indicated that in cohort studies the risk of ARC significantly decreased by 26% for every 10-mg/d increase in lutein or zeaxanthin intake (RR: 0.74; 95% CI: 0.67, 0.80; P < 0.001), by 18% for each 500-mg/d increase in vitamin C intake (RR: 0.82; 95% CI: 0.74, 0.91; P < 0.001), by 8% for each 5-mg/d increase in β-carotene intake (RR: 0.92; 95% CI: 0.88, 0.96; P < 0.001), and by 6% for every 5 mg/d increase in vitamin A intake (RR: 0.94; 95% CI: 0.90, 0.98; P < 0.001). Conclusions Higher consumption of certain vitamins and carotenoids was associated with a significant decreased risk of ARC in cohort studies, but evidence from RCTs is less clear.

scholarly journals Validation and reproducibility of an FFQ for use among adults in Botswana

2012 ◽  
Vol 16 (11) ◽  
pp. 1995-2004 ◽  
Author(s):  
Maria D Jackson ◽  
Boitumelo S Motswagole ◽  
Lemogang D Kwape ◽  
Rosemary I Kobue-Lekalake ◽  
Tidimalo B Rakgantswana ◽  
...  
Keyword(s):  
Vitamin E ◽  
Correlation Coefficients ◽  
Food Group ◽  
Leafy Vegetables ◽  
Spearman Correlation ◽  
Food Groups ◽  
Nutrient Intakes ◽  
Relative Validity ◽  
Dark Green ◽  
Β Carotene

AbstractObjectiveTo evaluate the validity and reproducibility of a 122-item interviewer-administered quantitative FFQ developed to determine food and nutrient intakes of adults in Botswana.DesignRelative validity of the FFQ was evaluated by comparing nutrient and food group intakes against four non-consecutive 24 h recalls administered over 12 months. The FFQ was repeated after 1 year to assess reproducibility.SettingKanye, Botswana.SubjectsSeventy-nine adults aged 18–75 years.ResultsSpearman correlation coefficients for the validity of energy-adjusted nutrients ranged from 0·42 (carbohydrate) to 0·49 (protein) for macronutrients and from 0·23 (Fe) to 0·44 (PUFA) for micronutrients. Exact agreement of quartile distribution for nutrients between the FFQ and recalls ranged from 27 % to 72 %. Weighted kappa values were lowest for retinol (0·13), Fe (0·22) and β-carotene (0·25) and ranged from 0·33 (SFA) to 0·59 (folate) for other nutrients (energy, carbohydrate, protein, fat, Ca and vitamin E). Spearman correlation coefficients between the recalls and FFQ for food groups ranged from 0·18 (dark green leafy and yellow vegetables) to 0·58 (poultry). Reproducibility correlation coefficients (energy-adjusted) varied between 0·39 for retinol and 0·66 for vitamin E, with most values falling between 0·50 and 0·60.ConclusionsThe FFQ had good relative validity for estimating habitual food group and nutrient intakes, but was poor for some micronutrients (Fe, retinol and β-carotene) and foods (fruits and dark green leafy vegetables).

Effects of high levels of vitamin e supplementation in heat stressed laying hens

1995 ◽  
Vol 1995 ◽  
pp. 49-49
Author(s):  
Sandy Bollengier ◽  
G. Uzu ◽  
P.E.V. Williams ◽  
C.C. Whitehead
Keyword(s):  
Heat Stress ◽  
Vitamin E ◽  
Egg Production ◽  
Laying Hens ◽  
Plasma Concentrations ◽  
Short Exposure ◽  
Dietary Vitamin ◽  
Small Scale ◽  
Supplemental Vitamin ◽  
High Level

It was investigated in a small-scale study using a climate-controlled room at IAPGR, Roslin, that the effects of feeding a high level of supplemental vitamin E (500 mg/kg) on egg production and plasma concentrations of egg-associated metabolites in laying hens subjected to a short exposure (7 days) to a moderate heat stress (temperature of 32°C). The study showed, on small group sizes (12 birds / group), that in control birds (fed 30 mg supplemental vitamin E/kg), this degree of heat stress depressed egg production by about 30%. In the birds receiving the high level of vitamin E, egg production was maintained at levels very close to those prior to the heat stress. The objective of this experiment was to confirm in a larger scale the effects of high levels of dietary vitamin E on egg production of hens exposed to a chronic heat stress and during a period of recovery at thermoneutral temperatures.

Dietary Vitamin E and β-Carotene Sources Influence Vitamin A and E Storage in Young Rats Fed Marginal and Adequate Vitamin E

1999 ◽  
Vol 34 (2) ◽  
pp. 235-241 ◽  
Author(s):  
Mamie Y. Jenkins ◽  
Geraldine V. Mitchell ◽  
Erich Grundel
Keyword(s):  
Vitamin E ◽  
Vitamin A ◽  
Dietary Vitamin ◽  
Young Rats ◽  
Β Carotene

Investigation of the vitamins A and E and β-carotene content in milk from UK organic and conventional dairy farms

2007 ◽  
Vol 74 (4) ◽  
pp. 484-491 ◽  
Author(s):  
Kathryn A Ellis ◽  
Ana Monteiro ◽  
Giles T Innocent ◽  
Dai Grove-White ◽  
Peter Cripps ◽  
...  
Keyword(s):  
Vitamin E ◽  
Vitamin A ◽  
Milk Fat ◽  
Dairy Farms ◽  
Farming System ◽  
Production Level ◽  
Carotene Content ◽  
Vitamin Content ◽  
The Uk ◽  
Β Carotene

During a 12-month longitudinal study, bulk-tank milk was collected from organic (n=17) and conventional (n=19) dairy farms in the UK. Milk samples were analysed for vitamin A (retinol), vitamin E (α-tocopherol) and β-carotene content. The farming system type, herd production level and nutritional factors affecting the milk fat vitamin content were investigated by use of mixed model analyses. Conventionally produced milk fat had a higher mean content of vitamin A than organically produced milk fat, although there were no significant differences in the vitamin E or β-carotene contents between the two types of milk fat. Apart from farming system, other key factors that affected milk fat vitamin content were season, herd yield and concentrate feeding level. Milk vitamin content increased in the summer months and in association with increased concentrate feeding, whilst higher-yielding herds had a lower milk vitamin E and β-carotene content. Thus, conventional dairy farms in the UK produced milk with a higher vitamin A content, possibly owing to increased vitamin A supplementation in concentrate feeds. However, knowledge of the effects of season, access to fresh grazing or specific silage types and herd production level may also be used by all producers and processors to enhance the vitamin content in milk.

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