Recent studies have provided compelling evidence to suggest that various environmental factors play a significant role in the development of food allergies. As our society experiences rapid economic growth, increased urbanization, and a shift towards a more Westernized diet, the incidence of food allergies is also on the rise and the pattern is gradually evolving. This review will delve into the changes in the epidemiology of food allergies within the Asia-Pacific region and the various dietary practices and factors that are postulated to play a role in the rise in food allergies over the years. Although there have been important advancements in the field of food allergies, there are still numerous uncertainties regarding the intricate relationship between diet and food allergies. Specifically, the role of epigenetic factors in influencing the susceptibility to food allergies, as evidenced by studies that assessed the impact of migration and rural-urban dynamics, is not fully understood. Addressing this knowledge gap presents an opportunity to develop more effective prevention and treatment strategies that could greatly benefit individuals living with food allergies.

Over the past decades, China has been undergoing rapid economic growth, which may have significantly influenced the dietary patterns and health status of the Chinese population. Our study aimed to assess the associations of potential macronutrient trajectory patterns with chronic diseases and all-cause mortality using the latent class trajectory model (LCTM) and the longitudinal data of the China Health and Nutrition Survey obtained between 1991 and 2015. A 24-hour diet recall was used to assess the dietary intake. The Poisson regression model was employed to investigate the correlations between trajectory patterns and chronic diseases and all-cause mortality. A total of 8115 participants were included in the final analysis. We explored four and three trajectory patterns for male and female populations, respectively. We found that a decreasing very high-carbohydrate trajectory together with a U-shape protein trajectory was associated with a higher risk of diabetes in the male population (odds ratio (OR): 2.23; 95% confidence interval (CI): 1.31-3.77). A similar pattern for moderate protein intake was also associated with the risk of diabetes in the female population (OR: 1.82; 95% CI: 1.18-2.79). In addition, we show that a decreasing low-carbohydrate trajectory and an increasing high-fat trajectory were associated with a lower risk of all-cause mortality (OR: 0.76; 95% CI: 0.60-0.96) and a higher risk of obesity (OR: 1.24; 95% CI: 1.05-1.47) in males. Our results shed light on some salient nutritional problems in China, particularly the dual challenges of undernutrition and overnutrition.

Despite mounting recognition of the essential role of women\'s empowerment in household dietary and nutrition changes, the diversity of culture across African countries presents ambiguity as to whether its impact is experienced homogeneously across the continent. This article presents a systematic review of whether women\'s empowerment changes household dietary patterns, contributes to nutrition improvement, and consequently affects diet-related health outcomes in Africa. We find that whilst more research needs to be conducted, particularly with improved methodologies that can establish cause-effect relationships, there is consensus among the literature on the link between women\'s empowerment and some domains of food security and dietary improvement. Meanwhile, studies on women\'s empowerment and the additional demand pressure on some food categories are quite limited. This exacerbates the challenge of setting production plans that aim to address the continent\'s question of food.

Although a significant body of literature has analyzed the effect of income-mediated policies on nutrition, research on how income affect nutrition consumption is scant. This paper contributes to the literature by decomposing the overall income effect on rural residents\' calorie intake into the direct income effect and the structure effect by building a simple theoretical model and conducting related empirical research with an instrumental variable (IV) approach. Using nationally representative data from China, we find that the structure effect of income, represented by fat share growth induced by income, occupies a considerable proportion (38.03%) of overall income effect. Additionally, we provide evidence of an asymmetric distributional effect of income on calorie intake. In particular, the structure effect of income substantially accounts for a larger proportion in the higher quantiles of the calorie intake distribution. Our findings help better evaluate the effectiveness of the income-mediated policies from quantity and structure perspectives in a comprehensive framework.

Food cultures can play a role in health and well-being. This raises the questions of whether nation boundaries unite the food cultures of different regions and ethnic groups, what characterises food cultures from very different parts of the world, and what similarities and differences exist. The present study aimed to investigate these questions with regard to eating traditions and modern eating practices. In this cross-sectional study, we recruited 3722 participants from ten countries - Brazil, China, France, Germany, Ghana, India, Japan, Mexico, Turkey, and the USA. Participants represented 25 regional and ethnic groups. They were queried about 86 traditional and modern facets of their food cultures in interviews, paper-pencil and online questionnaires. First, hierarchical cluster analysis suggested nine distinct clusters of food cultures - the food cultures of the Brazilian, Chinese, Ghanaian, Indian, Japanese, Mexican, Turkish, African and Latin US American samples, and of European descendants. Interestingly, for seven of the ten investigated countries, nation boundaries united food cultures. Second, each of the nine food culture clusters was characterised by a unique pattern of traditional and modern eating practices. Third, the nine food culture clusters varied more in their traditional eating practices than their modern eating practices. These results might promote a better understanding of the link between food cultures and health and well-being that goes beyond nutrients. For instance, food cultures might be linked to well-being via strengthening people\'s sense of cultural identity. Moreover, the present results contribute to a better understanding of the complex interplay between food and culture, and could help in developing culturally competent interventions to improve diet and reduce the risk of eating-related diseases.

Poor diet quality is a major driver of both classical malnutrition and noncommunicable disease (NCD) and was responsible for 22% of adult deaths in 2017. Most countries face dual burdens of undernutrition and NCDs, yet no simple global standard metric exists for monitoring diet quality in populations and population subgroups.
We aimed to develop an easy-to-use metric for nutrient adequacy and diet related NCD risk in diverse settings.
Using cross-sectional and cohort data from nonpregnant, nonlactating women of reproductive age in 10 African countries as well as China, India, Mexico, and the United States, we undertook secondary analyses to develop novel metrics of diet quality and to evaluate associations between metrics and nutrient intakes and adequacy, anthropometry, biomarkers, type 2 diabetes, and iteratively modified metric design to improve performance and to compare novel metric performance to that of existing metrics.
We developed the Global Diet Quality Score (GDQS), a food-based metric incorporating a more comprehensive list of food groups than most existing diet metrics, and a simple means of scoring consumed amounts. In secondary analyses, the GDQS performed comparably with the Minimum Dietary Diversity - Women indicator in predicting an energy-adjusted aggregate measure of dietary protein, fiber, calcium, iron, zinc, vitamin A, folate, and vitamin B12 adequacy and with anthropometric and biochemical indicators of undernutrition (including underweight, anemia, and serum folate deficiency), and the GDQS also performed comparably or better than the Alternative Healthy Eating Index - 2010 in capturing NCD-related outcomes (including metabolic syndrome, change in weight and waist circumference, and incident type 2 diabetes).
The simplicity of the GDQS and its ability to capture both nutrient adequacy and diet-related NCD risk render it a promising candidate for global monitoring platforms. Research is warranted to validate methods to operationalize GDQS assessment in population surveys, including a novel application-based 24-h recall system developed as part of this project.

The nutrition status of children is gaining more attention with a rapid nutrition transition. This study aimed to investigate trends and urban-rural differences in dietary energy and macronutrient composition among Chinese children. A total of 7565 participants aged 6 to 17 years were obtained from three rounds (1991, 2004 and 2015) of the Chinese Health and Nutrition Survey (CHNS). The individual diet was evaluated via three consecutive 24-hour dietary recalls and compared with the Chinese Dietary Reference Intakes (DRIs). From 1991 to 2015, there was a significant increase in children\'s fat intake, the proportion of energy intake from fat, and the proportion of children with more than 30% of energy from fat and less than 50% of energy from carbohydrates (p < 0.001). Compared with the DRI, the proportion with higher fat and lower carbohydrate intakes were, respectively, 64.7% and 46.8% in 2015. The urban-rural disparities in fat and carbohydrate intake gradually narrowed, while the gap in protein intake increased notably over time (p < 0.001). Chinese children experienced a rapid transformation to a low-carbohydrate and high-fat diet. Urban-rural disparities persistently existed; further nutritional interventions and education were of great significance, so as to ensure a more balanced diet for Chinese children.

Nutrition transition in China has a strong impact on dietary quality and health of Chinese consumers. This study developed the diet quality divergence Index (DQD), the divergence between real food consumption and the Chinese food pagoda 2016 (CFP), to measure the quality of diet in China. Using four waves of data (2004, 2006, 2009, and 2011) from China Health and Nutrition Survey (CHNS), this study shed light on the transition of diet quality for Chinese residents. Results indicate that the DQD generally decreased and Chinese diet quality improved during 2004-2011. The divergence was mainly caused by over-consumption of legumes and nuts, and under-consumption of milk and milk products. Rising income and urbanization were positively correlated with diet quality for the people with low DQD. However, both of them had negative impacts on diet quality for those with high DQD. Females and rural residents held a lower DQD than their counterparts. The results also revealed that healthy food preference, education, dining at home, household size, proportions of teens (6-17) and elders (over 64) in the families are positively correlated with Chinese diet quality. However, labor intensity, frequency of drinking alcohol, and smoking have negative impacts on diet quality. Moreover, higher DQD was found to be associated with increasing risks of overweight/obesity. Therefore, we suggest national healthy policies should pay more attention to nutrition education. It is also necessary to focus on populations with poor diet quality and to adopt measures to control drinking alcohol and smoking.

Knowledge regarding nutrition transition in Nepal remains limited. This systematic review examined the shifts in undernutrition and overnutrition in Nepal during the past two decades. We searched PubMed for studies and reports published between January 1, 2000, and June 30, 2018. Publications with a sample size greater than or equal to 500 that reported prevalence of nutritional status were included. Six large national reports and 36 studies met study inclusion criteria and were included. Overall, available nationally representative data remained limited. The Nepal Demographic and Health Survey 2001 to 2016 showed that underweight prevalence decreased from 26.7% to 17.2% and prevalence of overweight/obesity increased from 6.5% to 22.1% among women of reproductive age (15-49 years). In preschool children, prevalence of stunting, wasting, and underweight decreased from 57.2% to 35.8%, 11.2% to 9.7%, and 42.7% to 27.0%, respectively. Prevalence of overweight/obesity was low among children and was higher in higher socio-economic status (SES) groups. The overweight-obesity/underweight ratios indicate a shift from undernutrition to overnutrition problem; it was more evident in urban areas and higher SES groups. In conclusion, Nepal is experiencing a nutrition transition. More research is warranted to address this shift, and well-tailored public health efforts need to combat the double burden of overweight/obesity and undernutrition.

This study evaluated global trends in ultraprocessed food and drink (UPFD) volume sales/capita and associations with adult body mass index (BMI) trajectories. Total food/drink volume sales/capita from Euromonitor for 80 countries (2002-2016) were matched to mean adult BMI from the NCD Risk Factor Collaboration (2002-2014). Products were classified as UPFD/non-UPFD according to the NOVA classification system. Mixed models for repeated measures were used to analyse associations between UPFD volume sales/capita and adult BMI trajectories, controlling for confounding factors. The increase in UPF volume sales was highest for South and Southeast Asia (67.3%) and North Africa and the Middle East (57.6%), while for UPD, the increase was highest for South and Southeast Asia (120.0%) and Africa (70.7%). In 2016, baked goods were the biggest contributor to UPF volume sales (13.1%-44.5%), while carbonated drinks were the biggest contributor to UPD volume sales (40.2%-86.0%). For every standard deviation increase (51 kg/capita, 2002) in UPD volume sales, mean BMI increased by 0.195 kg/m2 for men (P < .001) and 0.072 kg/m2 for women (P = .003). For every standard deviation (40 kg/capita, 2002) increase in UPF volume sales, mean BMI increased by 0.316 kg/m2 for men (P < .001), while the association was not significant for women. Increases in UPFD volume sales/capita were positively associated with population-level BMI trajectories.