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Article
Publication date: 28 April 2020

Mina Movahedian, Jamal Rahmani, Zahra Yari, Samaneh Rashvand and Azita Hekmatdoost

The purpose of this paper is to evaluate the possible relationship of dietary glycemic index (GI) and glycemic load (GL) with ulcerative colitis (UC) risks because there is…

Abstract

Purpose

The purpose of this paper is to evaluate the possible relationship of dietary glycemic index (GI) and glycemic load (GL) with ulcerative colitis (UC) risks because there is insufficient evidence on the association of GI and GL with UC incidences.

Design/methodology/approach

In this case–control study, dietary GI and GL of 62 patients with histology-confirmed UC and 124 controls were assessed using a validated semi-quantitative food frequency questionnaire. The primary outcome measure was the association between dietary GI and GL and UC risk.

Findings

In age-adjusted and unadjusted models, there was no statistically significant association between dietary GI and GL and UC risk. However, after adjusting for all known covariates, the odds ratio of UC in third tertile of GI was 2.86 folds higher than first tertile (95% CI: 1.02–8.00, p for trend = 0.04). In the case of GL, when the confounders were adjusted, although subjects in the third tertile were at 2.70 times higher risk of having UC than those in the first tertile (95% CI: 0.72–10.15, p for trend = 0.15), the association was not statistically significant.

Originality/value

In conclusion, the findings indicate a positive relationship between dietary GI and risk of UC. Further prospective studies are needed to elucidate if the findings are consistent, in addition to experimental studies to explore the potential mechanisms of this association.

Details

Nutrition & Food Science , vol. 51 no. 1
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 29 October 2018

Hadi Emamat, Hossein Farhadnejad, Hossein Poustchi and Azita Hekmatdoost

The purpose of this paper is to assess the association between galactose intake and risk of nonalcoholic fatty liver disease (NAFLD).

Abstract

Purpose

The purpose of this paper is to assess the association between galactose intake and risk of nonalcoholic fatty liver disease (NAFLD).

Design/methodology/approach

In total, 196 newly diagnosed patients with NAFLD and 803 controls were recruited from a referral hepatology clinic. Dietary intakes were assessed using a validated and reliable food frequency questionnaire. Dietary intakes of galactose were compared between cases and controls.

Findings

Median (interquartile range) of dietary galactose intake was 2.24 (1.36-3.53) g/day for all subjects. In age and sex adjusted-model, subjects in the highest tertile of galactose intake had more than three times higher risk of NAFLD compared with those in the lowest tertile (odds ratio [OR]: 3.05; 95 per cent confidence interval [CI]: 2.02-4.54), (p-value < 0.001). Additionally controlling for body mass index (BMI), physical activity, energy intake and dietary lactose intake, the direct association between galactose intake and NAFLD remained significant (OR: 2.77; 95 per cent CI: 1.55-4.95), (p-value < 0.001).

Originality/value

This study was the first one to assess the association between galactose intake and risk of NAFLD.

Details

Nutrition & Food Science, vol. 49 no. 3
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 18 March 2019

Mehrnaz Nikkhah-Bodaghi, Matin Ghanavati and Azita Hekmatdoost

Polyphenols are plant-derived bioactive compounds with some known hepato-protective effects. The purpose of this study is to evaluate the association between polyphenol…

Abstract

Purpose

Polyphenols are plant-derived bioactive compounds with some known hepato-protective effects. The purpose of this study is to evaluate the association between polyphenol consumption and risk of nonalcoholic fatty liver disease (NAFLD) and its related conditions such as impaired lipid profile and elevated hepatic enzymes.

Design/methodology/approach

A total of 196 NAFLD patients and 803 controls were enrolled in this case-control study. Biochemical and anthropometric measurements as well as polyphenol consumption during the previous year were assessed.

Findings

In unadjusted model, participants who consumed the third and fourth quartiles of polyphenols intake were less likely to have NAFLD in comparison to those who consumed the first quartile [odds ratio, OR: 0.48; 95 per cent confidence interval, CI: (0.30-0.77) and OR: 0.62; 95 per cent CI: (0.40-0.96), respectively]. In separate analysis of genders, this effect was seen only in male participants [OR: 0.29; 95 per cent CI: (0.14-0.58) and OR: 0.21; 95 per cent CI (0.10-0.42), respectively], and the association remained significant after adjustment for energy, body mass index, age and smoking.

Originality/value

Higher total polyphenol intake is associated with a decreased risk of NAFLD. Prospective studies are needed to confirm these results.

Details

Nutrition & Food Science, vol. 49 no. 5
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 27 November 2018

Hadi Emamat, Kurosh Djafarian, Hadith Tangestani, Azita Hekmatdoost and Sakineh Shab-Bidar

This study aims to systematically review randomized clinical trials (RCTs) evaluated the effects of resveratrol on vascular flow-mediated dilation (FMD).

Abstract

Purpose

This study aims to systematically review randomized clinical trials (RCTs) evaluated the effects of resveratrol on vascular flow-mediated dilation (FMD).

Design/methodology/approach

All published RCTs in English were systematically searched on PubMed and Scopus search engines up to October 2017. A total of 61 studies were found through search databases. The outcome variable of interest was FMD. Six articles which met inclusion criteria were included in this study.

Findings

From six studies, four showed a significant improvement in FMD after resveratrol supplementation acutely or chronically in subjects with cardio-metabolic risk factors. Two other studies did not show any significant effect of resveratrol on FMD.

Originality/value

The authors systematically reviewed the effectiveness of resveratrol supplementation on FMD for the first time. The findings suggest that pure resveratrol supplementation may have beneficial effects on endothelium dependent vasodilatation indicator, FMD.

Details

Nutrition & Food Science, vol. 49 no. 4
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 7 February 2020

Hadi Emamat, Hossein Farhadnejad, Hadith Tangestani, Ali Saneei Totmaj, Hossein Poustchi and Azita Hekmatdoost

Non-alcoholic fatty liver disease (NAFLD) is the most common cause of liver disease worldwide. The purpose of this study is to assess the possible association between habitual…

Abstract

Purpose

Non-alcoholic fatty liver disease (NAFLD) is the most common cause of liver disease worldwide. The purpose of this study is to assess the possible association between habitual intake of allium vegetables and NAFLD risk.

Design/methodology/approach

In this study, 196 cases of NAFLD and 803 age-matched controls were enrolled from the same clinic. Dietary intakes were assessed using a validated food frequency questionnaire. Consumption of allium vegetables, including raw garlic and onions, were calculated and considered as grams/day in all participants.

Findings

Participants in the highest tertile of allium vegetable intake had 64% lower risk of NAFLD compared with those in the lowest tertile of the allium vegetables intake (odds ratio [OR]: 0.35; 95% confidence interval [CI]: 0.23-0.51; p < 0.001). After controlling for potential confounders, there was no significant change in this inverse association (OR: 0.36; 95% CI: 0.22-0.56; p < 0.001).

Originality/value

This study for the first time showed that higher consumption of allium vegetables was associated with lower risk of NAFLD. The results did not change when the authors adjusted the analysis for the known risk factors of the disease, which indicate the independency of the association.

Details

Nutrition & Food Science , vol. 50 no. 6
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 22 July 2020

Hadi Emamat, Hossein Farhadnejad, Mina Movahedian, Hadith Tangestani, Parvin Mirmiran and Azita Hekmatdoost

Data on relationship between dietary intake of sodium and non-alcoholic fatty liver disease (NAFLD) risk are scarce. This paper aims to find the possible association between…

Abstract

Purpose

Data on relationship between dietary intake of sodium and non-alcoholic fatty liver disease (NAFLD) risk are scarce. This paper aims to find the possible association between sodium intake and NAFLD.

Design/methodology/approach

This is a case-control study on NAFLD patients proven by a gastroenterologist using Fibroscan, and age-matched controls. Dietary intakes were assessed using a valid and reliable food frequency questionnaire.

Findings

In the multivariable-adjusted model, after adjustment for potential confounding variables, participants in the highest tertile of sodium intake had a greater risk of developing NAFLD (OR= 2.42; 95% CI: 1.13–5.15) compared to those in the lowest tertile of sodium intake (p-value = 0.023). In sub-analysis, subjects with BMI ≥ 25 in the third tertile of sodium intake had higher risk of NAFLD compared to those in the lowest tertile of sodium intake [(OR: 3.95; 95% CI: 1.75–8.90), (p-value = 0.001)]. However, no significant association was found between tertiles of energy-adjusted daily sodium intake and NAFLD prevalence risk in participants with BMI < 25.

Originality/value

The findings revealed that higher sodium intake is related with a higher prevalence of NAFLD, an association that can be partly mediated through obesity.

Details

Nutrition & Food Science , vol. 51 no. 3
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 14 October 2019

Nasim Rezaeimanesh, Soodeh Razeghi Jahromi, Abdorreza Naser Moghadasi, Pegah Rafiee, Zeinab Ghorbani, Nahid Beladi Moghadam, Azita Hekmatdoost and Mohammad Ali Sahraian

Neuromyelitis Optica Spectrum Disorder (NMOSD) is a rare disease with unknown risk factors. The role of oxidative stress and nutritional factors is imprecise in NMOSD development…

Abstract

Purpose

Neuromyelitis Optica Spectrum Disorder (NMOSD) is a rare disease with unknown risk factors. The role of oxidative stress and nutritional factors is imprecise in NMOSD development. Therefore, this paper aims to evaluate the effects of dietary total antioxidant capacity (TAC) on the odds of NMOSD.

Design/methodology/approach

Dietary TAC was determined in 70 definite NMOSD cases and 164 healthy controls in term of Ferric Reducing Antioxidant Power (FRAP) method. A validated 168-item semi-quantitative food frequency questionnaire (FFQ) was used for dietary assessment. Three multivariate regression models were applied to analyze the odds of NMOSD across the TAC quartiles.

Findings

A significant inverse association was found between dietary TAC and odds of being assigned to the NMOSD group in all three regression models. In the fully adjusted model ORs (95% CI) in the second, third and fourth quartiles of TAC vs the first quartile were as follows: 0.11 (0.04-0.29), 0.05 (0.01-0.16) and 0.01 (0.00-0.05), respectively. Odds of NMOSD also indicated a significant decreasing trend across the quartiles of dietary TAC (p-trend: <0.01). Total energy (p < 0.01) as well as consumption of vegetables (p < 0.01), whole grains (p < 0.01), tea and coffee (p < 0.01), legumes (p < 0.01) and poultry (p < 0.01) significantly increased through the TAC quartiles.

Originality/value

In the present study, a new hypothesis was proposed concerning the influence of dietary TAC on the odds of NMOSD. A diet rich in foods with high TAC can be effective in the modification of the NMOSD odds.

Details

Nutrition & Food Science , vol. 50 no. 4
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 24 September 2019

Somayeh Tajik, Kevan Jacobson, Sam Talaei, Hamed Kord-Varkaneh, Zeinab Noormohammadi, Ammar Salehi-Sahlabadi, Mehran Pezeshki, Jamal Rahmani and Azita Hekmatdoost

The results of human studies evaluating the efficacy of plant Phytosterols on liver function were inconsistent. Therefore, the purpose of this paper is to eliminate these…

Abstract

Purpose

The results of human studies evaluating the efficacy of plant Phytosterols on liver function were inconsistent. Therefore, the purpose of this paper is to eliminate these controversies about the Phytosterols consumption on liver serum biochemistry in adult subjects.

Design/methodology/approach

The literatures systematically searched throughout PubMed and Scopus databases up to June 2018; it was conducted by using related keywords. Estimates of effect sizes were expressed based on weighted mean difference (WMD) and 95% CI from the random-effects model (erSimonian and Laird method). Heterogeneity across studies was assessed by using I2 index. Eighteen studies reported the effects of Phytosterols (PS) supplementation on liver serum biochemistry.

Findings

The current meta-analysis did not show a significant effect on ALT (MD: 0.165 U/L, 95% CI: −1.25, 1.58, p = 0.820), AST (MD: −0.375 IU/Liter, 95% CI: −1.362, 0.612, p = 0.457), ALP (MD: 0.804 cm, 95% CI: −1.757, 3.366, p = 0.538), GGT (MD: 0.431 U/L, 95% CI: −1.803, 2.665, p = 0.706) and LDH (MD: 0.619 U/L, 95% CI: −4.040, 5.277, p = 0.795) following PS consumption.

Originality/value

The authors found that no protective or toxic effects occur after the consumption of Phytosterols on liver enzymes including ALT, AST, ALP, LDH and GGT.

Article
Publication date: 13 July 2018

Asal Neshatbini Tehrani, Hossein Farhadnejad, Amin Salehpour, Reza Moloodi, Azita Hekmatdoost and Bahram Rashidkhani

To the best of our knowledge, the studies on determining adherence to the Mediterranean dietary pattern (MDP) in Iran as a non-Mediterranean country are scarce. Thus, the aim of…

Abstract

Purpose

To the best of our knowledge, the studies on determining adherence to the Mediterranean dietary pattern (MDP) in Iran as a non-Mediterranean country are scarce. Thus, the aim of the study is to determine the adherence to the MDP in a sample of female adolescents who are residents of Tehran, Iran.

Design/methodology/approach

In this cross-sectional study, 263 female adolescents aged 15-18 years were studied. Information on socio-demographic, lifestyle and anthropometric variables were obtained using a structured questionnaire. Also, dietary intakes were determined using a validated 168-item food frequency questionnaire. Adherence to MDP was characterized using Mediterranean-style dietary pattern score (MSDPS).

Findings

Typically, the mean ± SD MSDPS was low in the present study (15.9 ± 5.6). The mean ± SD age and body mass index of the study population was 16.2 ± 0.9 years and 22.2 ± 4.1 kg/m2, respectively. In this study, the maximum MSDPS was 34.3, which was only one-third of maximum possible score (100). Multiple linear regression analyses showed that higher MSDPS scores were positively associated with age (standardized β = 0.1; p = 0.006), higher energy intake (standardized β = 0.2; p < 0.001) and marginally higher physical activity (standardized β = 0.1; p = 0.079).

Originality/value

Understanding low adherence to MDP in Tehranian female adolescents can provide basic knowledge to launch systematic programmes for gravitation toward MDP.

Details

Nutrition & Food Science, vol. 48 no. 5
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 12 August 2020

Asal Neshatbini Tehrani, Hossein Farhadnejad, Amin Salehpour and Azita Hekmatdoost

This study aims to investigate the association of vitamin D intake and the risk of depression, anxiety and stress among Tehranian female adolescents.

Abstract

Purpose

This study aims to investigate the association of vitamin D intake and the risk of depression, anxiety and stress among Tehranian female adolescents.

Design/methodology/approach

This cross-sectional analysis included 263 participants. A valid and reliable food frequency questionnaire was used to determine dietary intake of vitamin D. Depression, anxiety and stress scores were characterized by Depression Anxiety Stress Score-21 questionnaire. Multivariable logistic regression was used to estimate the odds ratio (OR) for the occurrence of depression, anxiety and stress according to the tertiles of vitamin D intake.

Findings

The mean ± standard deviation age and body mass index (BMI) of participants were 16.2 ± 1.0 years and 22.2 ± 4.1 kg/m2, respectively. Mean score of depression, anxiety and stress of participants were 9.8 (low-grade depression), 8.4 (low-grade anxiety) and 14.0 (borderline for stress), respectively. In the final model, after adjustment for age, BMI, physical activity, mother/father’s education level, dietary fiber and total energy intake, the OR for depression in the highest compared to the lowest tertile of vitamin D intake was 0.53 (95% confidence interval [CI], 0.24–0.98) (p for trend: 0.040). Moreover, based on the fully adjusted model, participants in the highest tertile of vitamin D intake had lower odds of stress (OR: 0.49; 95% CI: 0.23–0.93), in comparison to those in the lowest one (p for trend: 0.021).

Originality/value

To the best of the authors’ knowledge, this is the first study to assess the association of vitamin D intake and risk of psychological disorders, including depression, stress and anxiety in Middle East and North Africa region’s female adolescents.

Details

Nutrition & Food Science , vol. 51 no. 4
Type: Research Article
ISSN: 0034-6659

Keywords

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