Journal of Nutritional Science最新文献

Understanding adolescents' diet and eating behaviours is crucial for informing public health strategies and policies, allowing interventions to be tailored effectively to enhance dietary patterns and improve overall health and quality of life. This study examined dietary patterns, dietary diversity, eating habits, food choice and the factors influencing these among adolescent girls in the Mion District, Ghana. A convergent parallel mixed-method design employing in-depth interviews (n = 30), two focus group discussions (n = 10) and survey data from 882 mother-daughter pairs was used. Key findings indicate that approximately 90% of girls achieved the minimum dietary diversity for women of reproductive age (MDD-W), with most consuming three meals daily. Staples were eaten daily, while fruits and unhealthy foods were less frequently eaten. Moderate/severe food insecurity was negatively associated with the MDD-W, whereas larger household size was positively correlated with the MDD-W. Older girls were less likely to eat breakfast, while household crop farm diversity increased the odds of eating supper on weekends. Moderate/severe food insecurity was inversely associated with intake of animal-sourced foods (ASFs), fruit, and unhealthy foods but positively correlated with vegetable consumption in the past month. Maternal non-literacy was linked to a lower intake of unhealthy foods, while specific ethnic backgrounds negatively influenced ASF intake. Wealthier households demonstrated higher consumption of staples. Qualitatively, health considerations, availability, taste, and cravings were major influencers of food choices. Food aversions were often tied to intolerance, fatigue from consuming the same foods repeatedly, and preferences related to taste and texture. These findings underscore the need for targeted nutritional interventions considering socio-economic and household factors to improve adolescent girls' dietary habits and overall health.

This study aimed to assess the extent to which first-morning void (FMV) urine samples can estimate sodium and potassium excretion compared with 24-hour (24-h) urine samples at the population level. We conducted a cross-sectional study collecting urine samples (FMV and 24-h) and two non-consecutive 24-h dietary recalls in a sub-sample from the Portuguese IAN-AF sampling frame. Six predictive equations were used to estimate 24-h sodium and potassium excretion from FMV urine samples. Pearson correlation coefficients were calculated to compare the association between FMV and 24-h urine collections. Cross-classifications into tertiles were computed to calculate the agreement between measured and estimated excretion with and without calibration. Pearson correlation coefficients were calculated to compare the excretion estimation from FMV and reported intake from 24-h dietary recalls. Bland-Altman plots assessed the agreement between two-day dietary recall and the best-performing calibrated equation. Data from eighty-six subjects aged 18-84 were analysed. Estimated sodium and potassium concentrations from the predictive equations moderate or strongly correlated with the measured 24-h urine samples. The Toft equation was the most predictive and reliable, displaying a moderate correlation (r=0.655) with no risk of over or underestimation of sodium excretion (p=0.096). Tanaka and Kawasaki equations showed a similar moderate correlation (r=0.54 and r=0.58, respectively) but tended to underestimate the 24-h urine excretion of potassium (p<0.001). Calibrated predictive equations using FMV urine samples provide a moderately accurate alternative and resource-efficient option for large-scale nutritional epidemiology studies when 24-h urine collection is impractical.

Recommended dietary fibre consumption is rarely met in high-income countries. Detailed analysis of fibre consumption patterns is essential to identify strategies for increasing intake. This study investigated the timing and sources of fibre intake in Switzerland, using data from the Swiss Nutrition Survey, menuCH (n = 2057, 18-75 years). Dietary characteristics were summarised for the adult population and for subgroups stratified by absolute (< 15 g/day, 15-<30 g/day, and >=30 g/day) and relative (< 10 g/1000 kcal/day, 10-<14 g/1000 kcal/day, and >=14 g/1000 kcal/day) fibre intake. Mean fibre intake of both 24 HDRs for each individual and contribution of food groups and timing (before breakfast, breakfast, during the morning, lunch, during the afternoon, dinner, after dinner/at night) was calculated. Fibre was mainly consumed at breakfast (4.1 g/day), lunch (6.0 g/day), and dinner (6.4 g/day). Intake at breakfast differed between the lowest and highest fibre intake groups by 6.4 g/day (absolute) and 4.3 g/day (relative). Breakfast skipping was more frequent among low-fibre intake groups (29% for absolute intake, 19% for relative intake) than in the overall population (15%). The main sources of dietary fibre were grain products (35.6%), followed by vegetables (18.3%) and fruits (18.2%), with whole grains accounting for 17.5% of grain intake. Legumes contributed only to 1% of total fibre intake. Public health efforts encouraging regular breakfast consumption, and intake of whole grains and legumes are recommended to improve fibre intake.

There are few studies on what diet mothers following a vegan diet (VD; or strict plant-based diet) choose for their children and how the child's diet is implemented in everyday life. The present study aimed to explore choices that mothers following a VD make regarding their child's diet and feeding practices, and what determines these choices. Mothers on a VD whose youngest child was <4 years old were recruited via social media or newsletters about a VD. Participants (N=28) were between 27 and 45 years old and had been adhering to a VD between 0.5 and 23 years. Online semi-structured interviews based on the Theory of Planned Behaviour were audio-recorded and transcribed verbatim. A hybrid thematic analysis approach was used to identify themes that emerged from the data. Mainly driven by ethical considerations of eating animal products, 21 (75%) women chose a VD for their child(ren). When the participant's partner followed a vegetarian diet (VEGD) or omnivorous diet (OMD), most women chose a VEGD (N=4) or OMD (N=3) for their child as well. Overall, women indicated to make well-considered choices regarding children's diet and related feeding practices. Determinants for the dietary choice for their children involved various motivations, attitudes, norms, facilitating/hindering factors and knowledge. In conclusion, driven mainly by ethical motivations, most women on a VD chose this diet for their children as well. Despite experiencing several hindering factors and acknowledging the potential negative effects of a VD, mothers seemed to make well-considered choices concerning their child's diet.

Green tea, a plant rich in bioactive compounds, has been highlighted for its beneficial effects. In the present systematic review and meta-analysis of randomised controlled trials (RCTs), the impact of green tea on inflammatory and oxidative markers is investigated. Using pre-defined keywords, online databases (PubMed, Scopus, Web of Science Core Collection, and Google Scholar) were searched for relevant articles, published from inception up to February 2024. The outcomes included C-reactive protein (CRP), tumour necrosis factor-α (TNF-α), interleukin-6 (IL-6), interleukin-1 beta (IL-1β), total antioxidant capacity (TAC), malondialdehyde (MDA), superoxide dismutase (SOD), and glutathione peroxidase (GPX). Analyses of subgroups, linear, and non-linear associations were also carried out. Out of 1264 records initially retrieved, 38 RCTs were included. Supplementation with green tea improved the following indicators: IL-1β (weighted mean difference (WMD): -0.10 pg/mL; 95% CI: -0.15, -0.06), MDA (WMD: -0.40 mcmol/L; 95 % CI: -0.63, -0.18), TAC (WMD: 0.09 mmol/L; 95% CI: 0.05, 0.13), SOD (WMD: 17.21 u/L; 95% CI: 3.24, 31.19), and GPX (WMD: 3.90 u/L; 95% CI: 1.85, 5.95); but failed to improve others, including CRP (WMD: 0.01 mg/L; 95% CI: -0.14, 0.15), IL-6 (WMD: -0.34 pg/mL; 95% CI:-0.94, 0.26), and TNF-α (WMD: -0.07 pg/mL; 95% CI: -0.42, 0.28). Supplementation with green tea can improve the body's oxidative status. However, the results showed no significant effect of green tea on inflammatory markers, except for IL-1β. Further studies are needed to determine the effectiveness of green tea, particularly on inflammatory status.

Maternal health and nutrition in early pregnancy play a vital role in the growth and development of the foetus. During this time, macro and micronutrients contribute to nutritional programming, which helps form the foundations of the foetus's life course health outcomes. This study aimed to investigate dietary habits, macro and micronutrient intake, micronutrient status, and folic acid supplement adherence among Emirati pregnant women in their first trimester. Data were collected according to the UAE-BCS study protocol, which was set up to investigate maternal nutrition, health, child growth, and developmental outcomes within the first 1000 days. Pregnant Emirati women with singleton pregnancies within their first trimester of pregnancy (between 8 and 12 weeks of gestation) were enrolled. The 24-hour food recall method was administered to collect dietary intake. The maternal mean average age was 29 years. Participants had high adherence to supplementation during pregnancy compared to preconception. The mean energy intake was 1345kcal, and 56% of participants consumed saturated fats above the acceptable macronutrient distribution ranges (AMDR), while 94% consumed below AMDR for total fibre. The consumption of micronutrients was below the recommended dietary allowance (RDA). Biochemical results show a high prevalence of low haemoglobin (74%) and deficiencies in vitamin D (39%) and vitamin E (96%). There is a need for research into dietary patterns and influences in pregnant women in the UAE. Furthermore, investigations of knowledge practices and attitudes towards supplementation and the factors contributing to folic acid supplement use are needed to inform government strategies and interventions.

The World Health Organization recommends countries adopt policies that encourage the creation of healthier food retail. In Australia, some organisations have created enforceable regulation for healthier food retail in settings under their contractual control. While progressive for public health, little evidence exists on the characteristics of individuals and organisations influencing sustainment of such initiatives. We explored the perspectives of those involved in a sustained (six year) real-world healthy vending initiative in a university setting in Melbourne, Australia. Qualitative interviews were undertaken with seven of the eight individuals involved in the initiative and informed by the Consolidated Framework for Implementation Research and the regulatory concept of social licence. Reflexive thematic analysis was used to generate themes on individual and organisational factors associated with sustainment. Two individual-level themes included participants enjoyment and skills for 'getting the job done' and working on innovative projects. Individual self-efficacy and enjoyment from working on innovative projects, combined with interviewees' perception that their organisation had a role in leading social change, contributed to the initiative's sustainment. Two organisation-level themes included the University leading innovation and having a responsibility to serve the needs of its community within the constraints of the need for 'financial viability' and the provision of 'consumer choice'. This study brings to the fore evidence on the individual and organisational characteristics that contribute to the sustainment of a healthy food vending initiative from the perspective of those involved in implementation. Exploration of the importance of these characteristics to other food retail settings is required.

South Asians are among the fastest-growing immigrant population group in the United States (U.S.) with a unique disease risk profile. Due in part to immigration and acculturation factors, South Asians engage differently with behavioural risk factors (e.g. smoking, alcohol intake, physical activity, sedentary behaviour, and diet) for hypertension, which may be modified for the primary prevention of cardiovascular disease. Using data from the Mediators of Atherosclerosis in South Asians Living in America cohort, we conducted a cross-sectional analysis to evaluate the association between behavioural risk factors for cardiovascular disease and diet. We created a behavioural risk factor score based on smoking status, alcohol consumption, physical activity, and TV watching. We also calculated a Dietary Approaches to Stop Hypertension (DASH) dietary score based on inclusion of relevant dietary components. We used both scores to examine the association between engaging with risk factors for hypertension and the DASH diet among a cohort of South Asian adults. We found that participants with 3-4 behavioural risk factors had a DASH diet score that was 3 units lower than those with no behavioural risk factors (aβ: -3.25; 95% CI: -4.28, -2.21) and were 86% less likely to have a DASH diet score in the highest category compared to the lowest DASH diet score category (aOR: 0.14; 95% CI: 0.05, 0.37) in the fully adjusted models. These findings highlight the relationship between behavioural risk factors for hypertension among South Asians in the U.S.

Metabolic syndrome (MetS) is a widespread and complex health disorder. Dietary habits and consumption of simple sugars have been shown to play an important role in the prevention and treatment of MetS. This cross-sectional study was conducted in a population of 3380 adults from the Shiraz University of Medical Sciences (SUMS) employees' health cohort. The healthy beverage index (HBI) and healthy beverage score (HBS) were calculated. Risk for MetS and its components, including blood pressure, fasting blood glucose, waist circumference, triglyceride levels, and high-density lipoprotein cholesterol, were measured using standardised protocols. Results showed a significant inverse association between higher adherence to HBI (OR = 0.60, 95% CI: 0.48-0.74, P < 0.001) and HBS (OR = 0.80, 95% CI: 0.65-0.97, P = 0.030) with lower risk of MetS. Also, we observed a significant association between higher level of HBI and HBS with decreased risk of hypertension, as a critical component of MetS. These findings support the notion that healthier beverage consumption, as indicated by higher HBI and HBS levels, may play a critical role in reducing the risk of MetS.

The study aims to identify family child care home (FCCH) setting- and environment-level predictors related to providers' perceived difficulty in implementing the Child and Adult Care Food Program (CACFP) recommendations for serving vegetables to children. This was a cross-sectional study, which used a validated paper-based survey with a multi-method data analysis approach. Participants were licenced FCCH providers (N = 943) in Nebraska, who were predominantly White (94%), non-Hispanic (97%), CACFP-participants (89%), and in urban areas (64%). Reflective latent variable modelling was conducted in Mplus to explore associations between dependent variable and predictors. Dependent variable was providers' perceived difficulty to implement CACFP recommendations for serving vegetables. Predictors were providers' mealtime practices, perceived barriers to serve healthy foods, CACFP participation, geographic location, food access, food insecurity, and child poverty. Qualitative comments (n=122) from the survey were analysed using direct content analysis approach. Providers' perceived lack of time to prepare foods and perceived children's taste preferences increased their perceived difficulty; and CACFP-participation decreased their perceived difficulty to implement CACFP recommendations for serving vegetables. Qualitative comments highlighted that providers felt discouraged to serve vegetables knowing that vegetables would likely be wasted because of children's preferences. More tailored professional development is required to address FCCH providers' perceived difficulty and build providers' skills on preparing time saving, CACFP-reimbursable and appealing vegetable recipes, and on strategies to promote vegetable consumption in children.