Food Availability Research Articles

Benefits Of Omega-3 In Peruvian Anchoveta: A Review Of Its Impact On Health

Objectives: The objective of the research was to analyze the current state of knowledge about Omega-3 in the Peruvian anchovy to understand its positive effects on health and promote its adequate consumption. Theoretical framework: The Omega-3 fatty acid present in the Peruvian anchovy is widely known by the scientific community, but its information has not been disseminated enough to know its positive effects in the treatment of inflammatory and autoimmune diseases. Method: The positive effects of Omega-3 fatty acid on health were explored from various perspectives, highlighting its anti-inflammatory action and potential in the prevention and treatment of chronic diseases. Results and discussion: The anchovy, abundant in the Peruvian sea and economic for its availability of catch by the fishing fleet, offers an accessible alternative without compromising the nutritional content, especially relevant in regions with low economy where other sources of Omega-3 are unreachable. It is concluded that anchovy is an accessible source of Omega-3 with considerable nutritional and economic value. Consumption improves public health by preventing chronic and autoimmune diseases. Implications of research: Promote public health policies that include anchovy to maximize its benefits to society, especially in vulnerable populations by ensuring food security and access to low-cost animal protein. Originality/Value: It is essential to promote public health policies that include anchovy in accordance with the ecosystem approach applied to fisheries, food security and sustainable development goals. a rethinking of dietary recommendations is suggested, especially in vulnerable populations in Peru.

Distribution and environmental drivers of macrofaunal nematode communities across gradients of methane seepage at cold seeps on Hikurangi Margin (New Zealand) and potential implications of disturbance from gas hydrate extraction

Cold seeps are areas characterised by specialized biological communities that rely on chemosynthesis for their nutrition. To date, research conducted on New Zealand’s Hikurangi Margin seep communities has focused on communities at 650-1200 m water depth. Here, we characterize the macrofaunal nematode communities of New Zealand cold seeps for the first time, and at deeper (> 1200 m) seep locations (Maungaroa, Glendhu and Urutī South). There were no significant difference in nematode abundance, species richness, diversity and evenness among the seep areas, which may reflect the lack of difference in most sediment variables. However, a consistent spatial pattern in nematode abundance was observed within all the seep areas on the Hikurangi Margin: abundance was highest at or near the seep centre, decreased steeply away from the centre and was low in the periphery. These spatially consistent patterns reflect the influence of methane seepage, which appears limited to the inner 150-200 m radius of each area, on nematode abundance via input of chemosynthetic food sources. We found significant differences in nematode community structure among all three areas, with most of the heterogeneity in community structure between the shallow Urutī South area and deeper Maungaroa and Glendhu areas, and differences among nematode communities of high, medium and low abundance associated with site-specific gradients in methane seepage. Within area variability in nematode community structure was mainly correlated with food availability and sediment grain size. Consistent with previous investigations of seep nematodes, we did not find evidence of seep endemics. Although deposit feeders were generally the most abundant feeding group, there were differences in the relative abundances of different feeding groups such as microvores and epigrowth feeders among the seep areas, and as a function of distance from the centre of the seep areas. Impact on seep communities from gas hydrate extraction processes may occur via reduction or potentially cessation of free-gas methane supply to the seafloor, ‘sand’ production at the seafloor due to the physical degradation of the substrate structure, or alteration of the structural integrity of the seafloor substrate. Any spatial management options considered for managing these impacts should reflect the differences in benthic community structure between depths and locations on the Hikurangi Margin.

Seasonal and Spatial Variation in the Diet of Gambusia holbrooki in Different Water Bodies of Karaburun Peninsula (Western Türkiye)

The Eastern mosquitofish Gambusia holbrooki Girard, 1859, has been widely introduced into tropical and temperate countries as a biological agent to control mosquitos, which are associated with diseases such as malaria and yellow fever. However, the species exhibits invasive characteristics by competing with native species for food and habitat use. This study investigates the feeding ecology of G. holbrooki populations from three distinct freshwater environments (Lake Iris, Eğlenhoca Reservoir, and Parlak Reservoir) on the Karaburun Peninsula (North-Western Türkiye), a region outside its native range. The primary aim was to evaluate seasonal and spatial variations in the diet of the species. A total of 871 specimens were analysed: 247 from Iris Lake, 318 from Parlak Reservoir, and 306 from Eğlenhoca Reservoir. Low percentages of empty stomachs (≤20%) across all populations indicate high feeding intensity. The results reveal that G. holbrooki exhibits a generalist feeding strategy, consuming a wide range of food items such as insects, zooplankton, and plant material across all the investigated environments. The relative importance of food groups (determined by the Importance Index, MI%) varied seasonally but not spatially. In all three populations, the most important food source in the spring was dipterans, followed by plants in the summer and fall, and cladocerans in the winter. Plants accounted for the largest percentage of the diet in every population (MI% >65%). These findings suggest that G. holbrooki adapts its diet to seasonal food availability.

The Impact of Shifting from Subsistence to Cash Crops on the Livelihoods of the Soliga Tribe in India

Efforts to protect and conserve nature are essential worldwide. However, in many protected forests, local communities have lived for centuries, relying on the environment for food, income, shelter, and cultural practices. Conservation regulations often impact their livelihoods. This study examines the challenges and opportunities for sustaining the livelihoods of Soliga tribe farmers in Biligiri Ranganatha Swamy Temple (BRT) Tiger Reserve, South India. A participatory workshop with five researchers and 25 diverse farmers (male, female, young, and old) discussed: a) current agricultural and livelihood practices; b) key drivers of land-use changes; and c) necessary actions for sustainable livelihoods. Findings showed that shifting from traditional subsistence crops to cash crops like coffee, pepper, and floriculture reduced food availability but increased cash income. Non-timber forest products such as honey, berries, nuts, and firewood significantly supplemented household needs. Challenges included low coffee yields due to disease and poor soil, changing rainfall patterns, limited land, and wildlife crop damage. The forest conservation policies enforced during the recent decades have limited their access to resources and traditional lands, affecting their food security and economic stability. Additionally, limited access to education and employment opportunities restricts their social and economic mobility. Ongoing research and support are needed to enhance sustainable farming techniques such as mulching, composting, intercropping, integrated pest management, and controlling Lantana spp. to achieve resilient farming systems.

Confronting food insecurity through agricultural interventions: the Farmer FIRST program in India

IntroductionNutrition-sensitive agricultural interventions are crucial in addressing malnutrition and promoting food security. The Farmer, Farm, Innovation, Resources, Science, and Technology (FIRST) Program is a national-level agricultural intervention program that was started in 2016 by the Indian Council of Agricultural Research (ICAR). Its primary objective is to transform the lives and livelihoods of Indian farmers, with a focus on income and livelihood security. This program envisages agricultural interventions ensuring national food security goals, with improved agricultural practices, enhanced food production, and increased access to nutritious food, especially for vulnerable populations.MethodsThis study aims to investigate the food security improvement resulting from implementing nutrition-sensitive interventions introduced under the Farmer FIRST Program (FFP) in 15 agroecological zones. Four key indicators were employed to assess food security in the technology-focused field intervention: food availability, purchasing power, food gap, and food diversity. Food availability was measured at the macro level (state or national) using per capita food availability. However, at the micro level, particularly for farmers who produce their food and are secure in terms of availability, yield increases from the selected interventions under FFP served as an alternative measure. Purchasing power was assessed by the additional income generated to buy food during the off-season. The food gap was assessed using the cereal equivalent quantity (CEQ), which captures an aspect of consumers’ nutritional security. Its impact in India was evaluated using the propensity score matching technique with difference-in-difference (D-i-D) measure to estimate the unbiased overall effect on food security. Food diversity was captured using Barry’s index.ResultsA sample of 2,282 respondents were interviewed from 2016 to 2020 to elicit data on the prevalence of undernutrition in India, which is 16.3%. The results revealed that post-intervention of the FFP, cereal availability increased by 147.74% in the Northern Plain, while pulses recorded over 200% growth in three regions. The incremental per capita farm income exceeded INR 20,000 in several zones, with the Northern Plain showing an increase of over 21 times. Food diversity improved marginally, supported by the integrated farming system. Overall, FFP interventions transformed nutritional security, benefiting 1,915 households, particularly in regions with historically low calorie intake, thereby demonstrating substantial gains in food security and living standards.ConclusionThe Farmer FIRST Program (FFP) has significantly improved dietary intake among participating households, enhancing food security. Nutrition-sensitive agricultural interventions under the FFP have reduced undernutrition by increasing food availability, boosting purchasing power, and narrowing the food gap.

The effect of size on mate selection, fecundity and survival in Culex pipiens mosquitoes

AbstractCulex pipiens L. is a medically important mosquito due to its abundance and ability to transmit West Nile virus. Despite being the focus of many mosquito control strategies, very little is known about its mating behaviour. Several control strategies rely on knowing female mate preferences to ensure their efficacy. Therefore, the purpose of this study was to characterize mate selection based on mate quality. Because larger individuals should have more resources available to be used towards mating behaviour, it was hypothesized that larger mates (males or females) would be of higher value and preferentially mated with compared to smaller ones. By manipulating food availability, males and females were reared to be either large or small adults and were mated with either a large or small mate. Through a series of experiments, the effect of size on mate success and post‐mating responses was assessed via insemination rates, blood feeding, egg laying, fertility and survival. Despite larger females living longer and being more fecund, males did not preferentially mate with larger females, nor did male size influence female survival or fecundity. Because larval rearing environment had an influence on adult morphology and fitness, it should be taken into consideration in mosquito control programmes.

Neighborhood environment associations with cognitive function and structural brain measures in older African Americans

BackgroundSince older adults spend significant time in their neighborhood environment, environmental factors such as neighborhood socioeconomic disadvantage, high racial segregation, low healthy food availability, low access to recreation, and minimal social engagement may have adverse effects on cognitive function and increase susceptibility to dementia. DNA methylation, which is associated with neighborhood characteristics as well as cognitive function and white matter hyperintensity (WMH), may act as a mediator between neighborhood characteristics and neurocognitive outcomes.MethodsIn this study, we examined whether DNA methylation in peripheral blood leukocytes mediates the relationship between neighborhood characteristics and cognitive function (N = 542) or WMH (N = 466) in older African American (AA) participants without preliminary evidence of dementia from the Genetic Epidemiology Network of Arteriopathy (GENOA).ResultsFor a 1-mile buffer around a participant’s residence, each additional fast food destination or unfavorable food store with alcohol per square mile was nominally associated with a 0.05 (95%CI: 0.01, 0.09) and a 0.04 (0.00, 0.08) second improvement in visual conceptual tracking score, respectively. Also, each additional alcohol drinking place per square mile was nominally associated with a 0.62 (0.05, 1.19) word increase in delayed recall score, indicating better memory function (all p < 0.05). Neighborhood characteristics were not associated with WMH. We did not find evidence that DNA methylation mediates the observed associations between neighborhood characteristics and cognitive function.ConclusionsThe presence of fast food destinations and unfavorable food stores with alcohol was associated cognitive measures, possibly due to greater social interaction provided in these venues. However, replication of these findings is necessary. Further examination of the potential pathways between the neighborhood environment and cognitive function/WMH may allow the development of potential behavioral, infrastructural, and pharmaceutical interventions to facilitate aging in place and healthy brain aging in older adults, especially in marginal populations that are most at risk.

Chronodisruption that dampens output of the central clock abolishes rhythms in metabolome profiles and elevates acylcarnitine levels in the liver of female rats.

Exposure to light at night and meal time misaligned with the light/dark (LD) cycle-typical features of daily life in modern 24/7 society-are associated with negative effects on health. To understand the mechanism, we developed a novel protocol of complex chronodisruption (CD) in which we exposed female rats to four weekly cycles consisting of 5-day intervals of constant light and 2-day intervals of food access restricted to the light phase of the 12:12 LD cycle. We examined the effects of CD on behavior, estrous cycle, sleep patterns, glucose homeostasis and profiles of clock- and metabolism-related gene expression (using RT qPCR) and liver metabolome and lipidome (using untargeted metabolomic and lipidomic profiling). CD attenuated the rhythmic output of the central clock in the suprachiasmatic nucleus via Prok2 signaling, thereby disrupting locomotor activity, the estrous cycle, sleep patterns, and mutual phase relationship between the central and peripheral clocks. In the periphery, CD abolished Per1,2 expression rhythms in peripheral tissues (liver, pancreas, colon) and worsened glucose homeostasis. In the liver, it impaired the expression of NAD+, lipid, and cholesterol metabolism genes and abolished most of the high-amplitude rhythms of lipids and polar metabolites. Interestingly, CD abolished the circadian rhythm of Cpt1a expression and increased the levels of long-chain acylcarnitines (ACar 18:2, ACar 16:0), indicating enhanced fatty acid oxidation in mitochondria. Our data show the widespread effects of CD on metabolism and point to ACars as biomarkers for CD due to misaligned sleep and feeding patterns.

Measuring Food and Water Security in an Aboriginal Community in Regional Australia.

To measure current levels and experiences of food and water security in Walgett to guide a community-led program and to provide a baseline measure. A community-led cross-sectional survey conducted in April 2022 by trained local researchers. Walgett, a regional town in NSW, Australia. A total of 251 Aboriginal adults. Food and water security levels and experiences were measured using the Household Food Insecurity Access Scale (HFIAS) and Household Water InSecurity Experiences (HWISE) Scale. The relationship between food and water insecurity was determined through linear regression analysis. Almost half of the respondents experienced food insecurity (46%) or water insecurity (44%) in the last 12 months. Most participants attributed food insecurity to difficulties with food affordability (71%) and availability (63%). More than four in five participants reported relying on purchased or donated bottled water due to main water source interruption (83%) or quality concerns (86%). Water insecurity was associated with food insecurity; HFIAS score increased by 0.43 points for every point higher on the HWISE scale. This study is the first to measure levels and experiences of food and water security in an Aboriginal community in Australia using validated tools. The results highlight the interconnectedness of food and water insecurity and provide evidence of levels far higher than Australian national level estimates and comparable to low- and middle-income countries. A holistic government response alongside community-led efforts are needed to increasefood and water security to improve health and well-being in remote Aboriginal communities.

The Role of Food Prices and Market Access in Contributing to Hunger in Low-Income Populations

This article investigates the role of food prices and market access in exacerbating hunger within low-income populations, emphasizing the economic dimensions of food insecurity. Drawing on case studies from Sub-Saharan Africa and Brazil, it highlights how food price volatility and inadequate infrastructure significantly contribute to hunger. High food prices, driven by global disruptions and local inefficiencies, force low-income households to reduce their food intake or opt for less nutritious options, worsening food insecurity. Limited road networks and insufficient storage facilities inflate logistical costs, further impeding food distribution and access. Key findings include Brazil’s Zero Hunger program, which successfully reduced hunger through targeted subsidies, social policies, and infrastructure investments, and the quantitative impact of improved transportation and storage facilities in Sub-Saharan Africa, which stabilized food prices and reduced costs. This research underscores the global significance of addressing hunger amid challenges like climate change and geopolitical disruptions. Policy recommendations include targeted subsidies for staple foods, public-private partnerships to enhance infrastructure, and price stabilization mechanisms. By highlighting the interconnectedness of economic policies, market access, and food security, this study provides policymakers, NGOs, and international organizations with actionable insights to mitigate hunger and build more resilient food systems for vulnerable populations.

The Links Between Community-Based Financial Inclusion and Household Food Availability: Evidence from Mozambique

Financial inclusion can boost wealth, health, and quality of life. However, few studies have examined how women’s participation in community-based financial inclusion opportunities, such as village saving and loan groups (VSLGs), relates to household food security. Using program data from central Mozambique, this study examined whether low-income women’s participation in VSLGs directly increases household food availability, as well as indirectly through increased asset ownership. Employing a post-test-only comparison group quasi-experimental design, the study sampled 205 female VSLG participants and non-participants from three sub-villages in Mozambique’s Sofala province. Structural equation modeling (SEM) results indicated that low-income women’s participation in VSLGs is directly associated with a reduction in household hunger score (β = −0.21, p &lt; 0.01), as well as indirectly associated through the mediating role of household assets ([Sobel indirect effect] = −0.06, p = 0.05). The VSLG participants showed a significant increase in household asset ownership compared to non-VSLG participants (β = 0.15, p &lt; 0.05). Further, increased asset ownership significantly correlated with a lower probability of household hunger (β = −0.30, p &lt; 0.01). The results suggest that community-based financial inclusion approaches could improve the availability of food through asset building among Mozambique’s low-income women. The study offers a potential strategy for policymakers and development experts to utilize community approaches to financial inclusion to improve rural and low-income women’s livelihoods.

A Unified Model for Addressing Hunger in Developed Countries: An Evidence-Based Analysis Integrating Climate Challenges, Country Stability, Economic Structures, and Policy Effectiveness

Hunger and food insecurity persist in developed countries, even amid wealth and abundant food resources, due to complex interconnections between climate challenges, political stability, economic inequality, and policy effectiveness. This paper introduces a unified model that integrates these four indicators to address food insecurity within affluent societies. Through an analysis of data from 20 developed nations and in-depth case studies of ten, we explore how these factors correlate with hunger rates. The results indicate that a multi-dimensional approach is essential for effectively reducing hunger. Specifically, countries that implement climate-resilient strategies, maintain political stability, promote economic equity, and apply targeted policies demonstrate significantly lower rates of food insecurity. Notably, the findings reveal that income inequality and climate resilience are critical drivers of food access disparities, while social spending alone may not suffice without strategic targeting. This study highlights the importance of a comprehensive, context-specific framework for addressing food insecurity, offering actionable recommendations for policymakers and stakeholders. By fostering climate adaptation, ensuring stable governance, and prioritizing equity in social programs, developed countries can more effectively combat hunger and support sustainable food security for all.

Diet Quality, Healthy Dietary Restrictions, and Adherence to the Mediterranean Diet in Food Deserts Among the Elderly in Spain

Background/Objectives: Food deserts are areas characterized by limited access to affordable and healthy food, often due to significant distances from supermarkets—exceeding 1.6 km in urban areas and 16 km in rural settings. These spatial limitations exacerbate health and socioeconomic disparities. This study aimed to assess diet quality and explore the barriers influencing dietary behaviors among individuals aged 60 and older residing in food deserts in Aragón, Spain. Methods: An exploratory qualitative study using a phenomenological approach was conducted, complemented by descriptive analyses of sociodemographic data and adherence to the Mediterranean diet, assessed through the PREDIMED questionnaire. Data were collected through in-depth interviews and a focus group with residents of food deserts. Results: Half of the participants showed high adherence to the Mediterranean diet, while the other half had moderate adherence. Despite the lack of access to supermarkets and higher food costs, many participants perceived their diet quality positively. Challenges, such as long distances to stores, limited public transport, and economic constraints, were mitigated through strategies like home gardening, hunting, and traditional cooking, which often reduced reliance on processed foods. However, participants also reported increased alcohol consumption as a means of socializing. Conclusions: Diet quality in Aragón’s food deserts reflects a balance between significant access barriers and community-driven resources. While participants leveraged local strategies to maintain diet quality, systemic issues remain. Public policies should focus on improving transportation, enhancing local food systems, and fostering community-based initiatives to reduce inequalities in food access and promote healthier dietary habits in rural areas.

Prevalence and contributors to anaemia among children aged 6 to 59 months in Kyangwali Refugee settlement, Western Uganda: a cross-sectional study

BackgroundAnaemia is a major cause of morbidity among children under five years in Uganda. However, its magnitude among refugee populations is marginally documented. In this study, the prevalence and contributors to anaemia among children 6 to 59 months in Kyangwali refugee settlement in Western Uganda was determined.MethodsThis was a cross-sectional study that was carried out among 415 mother- child dyads at Kwangwali refugee settlement. Anaemia was determined by measuring haemoglobin concentration using the HaemoCue method, while nutritional status was examined using standard World Health Organisation (WHO) nutritional indices. Data abstraction forms, pretested questionnaires and face to face interviews were used to collect patient data. Associations between the independent variables and anaemia were examined using modified Poisson regression with robust standard errors. In all statistical tests, a P- value of < 0.05 was considered as significant.ResultsThe proportion of children with anaemia was 49.2% (95% CI: 44.4–53.9). Anaemia was 1.4 times (95% CI = 1.13–1.82; p = 0.003) more prevalent among wasted children than the normal children. The prevalence of anaemia was also higher among underweight children than those with normal weight (aPR = 1.37, 95% CI = 1.11–1.70; p = 0.004). Additionally, the prevalence of anaemia was higher among children of birth order of 6 or above (aPR = 2.00, 95% CI = 1.22–3.29; p = 0.006), while anaemia prevalence was lower among children whose mothers’ had attained secondary level of education (aPR = 0.19, CI = 0.04–0.98; p = 0.048) and those who fed on fish (aPR = 0.75, 95% CI = 0.57–0.99; p = 0.039) and meals prepared with oils and fats (aPR = 0.70, 95% CI = 0.51–0.97; p = 0.029). There was no significant relationship between anaemia occurrence and the household dietary diversity score.ConclusionsAbout half of the study children were found to be anaemic. The most significant contributors to anaemia in the study population were malnutrition, maternal education, feeding practices and birth order. The study findings suggest need of screening of children for anaemia at all nutritional clinics, promotion of education, addressing barriers to sustainable food supply and accessibility of nutrient-dense foods, treating anaemia in children alongside other micronutrient deficiencies and addressing the nutritional needs of multiparous mothers in refugee communities.

"Atlanta Is Like Wakanda… but With Real Big, Big Issues": A Focus Group Study of Community Strengths and Health Issues in Diverse Groups in Atlanta, Georgia.

This qualitative study explored perceived community strengths and health issues among 3 underserved and under-studied populations in the Atlanta, Georgia-older adults, Black or African American persons, and refugees/immigrants/migrants. Eight focus groups were conducted with 92 participants who were members of the 3 populations in Atlanta between November 2022 and March 2023. Although there were variations among groups, all groups emphasized diversity within their community as the foundation of community strength. Elements of the built environment such as parks, convenience stores, the Atlanta Beltline, and food outlets bolstered community strength. Furthermore, community members being able to voice concerns and the responsiveness of governmental institutions helped form strong relationships to build a strong community. Regarding health issues, common physical health concerns included hypertension and obesity, with varied mental health issues. Accessibility and affordability of healthy foods were significant social concerns, alongside challenges in healthcare access such as navigating complex systems and high medical costs. Tailored interventions recognizing community strengths and addressing specific health issues are crucial for improving outcomes in marginalized communities, necessitating a health-in-all policies approach considering social, cultural, and structural determinants of health.

The effect of traditional agricultural practices on the food consumption of households facing extreme weather events in Tanzania

BackgroundAn estimated 140 million people in Africa face acute malnutrition. By impacting agricultural production, climate change is likely to further decrease food consumption, particularly in sub-Saharan African states. Against this backdrop, various actors have called for more attention to alternative farming and food systems based on traditional agricultural knowledge capable of ensuring access to sufficient, nutritious, and safe food. So far, however, we have limited systematic evidence on which traditional agricultural practices may promote the food resilience of households exposed to extreme climatic conditions. Focusing on the most prevalent traditional diversification practices in Tanzania, this study assesses the extent to which crop diversification, annual crop intercropping, crop-tree intercropping, crop-livestock integration, and the cultivation of traditional crops increase the food availability and dietary diversity of smallholders facing extreme weather events in Tanzania.MethodsWe combine temperature and rain data with information on farming practices and food consumption information provided by the Living Standards Measurement Study–Integrated Surveys on Agriculture for more than 25,000 Tanzanian households nationwide. We rely on a matched differences-in-differences approach to account for selection bias and allow for causal inference.ResultsOur matching models consistently show that the planting of traditional crops (in particular sorghum) promotes dietary diversity and reduces the need for food rationing in households experiencing climate shocks. In contrast, households relying on maize cultivation show less dietary diversity and increased food rationing behavior. In addition, we find that—under extreme weather conditions—crop diversification furthers households’ dietary diversity, and crop-livestock integration, as well as crop-tree intercropping, seem to reduce households’ need to ration food.Conclusion and policy recommendationThis study has important implications for policymakers. In light of climate change and weather variability, it underscores the need to better integrate indigenous knowledge into farming systems. Our results call for greater dissemination of traditional diversification strategies and more reliance on indigenous, drought-tolerant crops. Traditional farming practices can function as a safety net, protecting smallholders in Tanzania against the detrimental consequences of weather shocks.

Bayesian doubly robust estimation of causal effects for clustered observational data

Observational data often exhibit clustered structure, which leads to inaccurate estimates of exposure effect if such structure is ignored. To overcome the challenges of modelling the complex confounder effects in clustered data, we propose a Bayesian doubly robust estimator of causal effects with random intercept BART to enhance the robustness against model misspecification. The proposed approach incorporates the uncertainty in the estimation of the propensity score, potential outcomes and the distribution of individual-level and cluster-level confounders into the exposure effect estimation, thereby improving the coverage probability of interval estimation. We evaluate the proposed method in the simulation study compared with frequentist doubly robust estimators with parametric and nonparametric multilevel modelling strategies. The proposed method is applied to estimate the effect of limited food access on the mortality of cardiovascular disease in the senior population.

Food Policy Councils and Healthy Food Access Policies: A 2021 National Survey of Community Policy Supports.

Food policy councils (FPCs) are frequently used to facilitate change in food systems at the local, state, and regional levels, or in tribal nations. The objective of this study was to describe the prevalence of food policy councils and similar coalitions among US municipalities and their associations with healthy food access policies. We used data from the 2021 National Survey of Community-Based Policy and Environmental Supports for Healthy Eating and Active Living, administered to municipal officials from May through September 2021. We used logistic regression models to examine associations between 1) having an FPC and 2) FPC membership composition and healthy food access policies. We grouped policies into 4 categories based on topic modules in the survey instrument: supporting new or existing food stores to sell healthy foods, financial or electronic benefits transfer (EBT) supports, transportation-related supports for accessing locations to purchase food, and consideration of local food supports in community planning. Municipalities with FPCs (27.6%) had significantly higher odds than municipalities without FPCs of having policies supporting access to food retail stores (adjusted odds ratio [AOR] = 1.5; 95% CI, 1.2-1.9), access to farmers markets (AOR = 2.2; 95% CI, 1.7-2.7), access to transportation supports (AOR = 2.2; 95% CI, 1.8-2.8), and objectives in community planning documents (AOR = 2.0; 95% CI, 1.6-2.5). Among municipalities with FPCs, those with a health/public health representative (42.1%) or a community representative (65.1%) were more likely to report having any healthy food access policies. This study emphasized the positive association between FPCs and healthy food access policies. This study also highlights the potential importance of FPC membership composition, including health/public health and community representatives.

Simulated retail food environments: A literature review of systems science approaches to advance equity in access to healthy diets.

As researchers increasingly utilize systems science simulation modeling (SSSM), little is known about how and by whom SSSMs are being leveraged to address inequities in access to healthy diets. We evaluated the extent to which studies (n = 66) employing SSSM to examine retail food environments (RFEs): included three pillars of equity (social position, human capital, socioeconomic and political context) that shape RFEs and access to healthy diets; grounded model design and development in theory; engaged with diverse stakeholders and lived experiences related to RFEs; and translated model findings towards addressing inequities in RFEs. Most studies (n = 58) included some model characteristics related to social position (e.g., age). Characteristics related to human capital (e.g., meal planning skills) were the least integrated fundamental pillar (n = 15). All studies included some characteristics related to socioeconomic and political context; however, we found little to no incorporation of social contexts (e.g., cultural and societal norms). Regarding model design and development, less than one-third of studies specified theoretical frameworks or engaged with local domain experts and stakeholders. While certain research objectives and, consequently, model types lend themselves better than others to address key pillars that influence RFEs, findings show that models are not fully leveraging SSSMs to analyze the multiple, interacting dimensions - particularly social phenomena - influencing equity in access to healthy diets. Greater attention to engaging stakeholders and the role of human capital and social contexts will likely better equip models to more holistically examine equitable food access, including essential pathways and unintended consequences of programs and policies.

Time-restricted feeding reduces cardiovascular disease risk in obese mice.

Disrupted feeding and fasting cycles as well as chronic high fat diet (HFD)-induced obesity are associated with cardiovascular disease risk factors. We designed studies that determined whether two weeks of time-restricted feeding (TRF) intervention in mice fed a chronic HFD would reduce cardiovascular disease risk factors. Mice were fed a normal diet (ND; 10% fat) ad libitum or HFD (45% fat) for 18 weeks ad libitum to establish diet-induced obesity. ND or HFD mice were continued on ad libitum diet or subjected to TRF (limiting food availability to 12 hr only during the dark phase) during the final two weeks of the feeding protocol. TRF improved whole-body metabolic diurnal rhythms without a change in body weight. HFD mice showed reduced blood pressure dipping compared to ND, which was restored by TRF. Further, TRF reduced aortic wall thickness, decreased aortic stiffness, as well as increased kidney tubular brush border integrity, decreased renal medullary fibrosis, and reduced renal medullary T cell inflammation in HFD mice. These findings indicate that TRF may be an effective intervention for improving vascular and kidney health in a model of established diet-induced obesity.