Dietary Transition Research Articles

What is the purpose of ultra-processed food? An exploratory analysis of the financialisation of ultra-processed food corporations and implications for public health

BackgroundIn recent decades there has been a global rise in consumption of ultra-processed foods (UPFs) to the detriment of population health and the environment. Large corporations that have focused heavily on low-cost manufacturing and extensive marketing of UPFs to maximise profits have driven this dietary transition. The same corporations claim to serve the interests of multiple ‘stakeholders’, and that they are contributing to sustainable development. This paper aimed to test these claims by examining the degree to which UPF corporations have become ‘financialised’, focusing on the extent to which they have prioritised the financial interests of their shareholders relative to other actors, as well as the role that various types of investors have played in influencing their governance. Findings were used to inform discussion on policy responses to improve the healthiness of population diets.MethodsWe adopted an exploratory research design using multiple methods. We conducted quantitative analysis of the financial data of U.S. listed food and agricultural corporations between 1962 and 2021, share ownership data of a selection of UPF corporations, and proxy voting data of a selection of investors between 2012 and 2022. We also conducted targeted narrative reviews using structured and branching searches of academic and grey literature.ResultsSince the 1980s, corporations that depend heavily on manufacturing and marketing UPFs to generate profits have been increasingly transferring money to their shareholders relative to their total revenue, and at a level considerably higher than other food and agricultural sectors. In recent years, large hedge fund managers have had a substantial influence on the governance of major UPF corporations in their pursuit of maximising short-term returns. In comparison, shareholders seeking to take steps to improve population diets have had limited influence, in part because large asset managers mostly oppose public health-related shareholder proposals.ConclusionsThe operationalisation of ‘shareholder primacy’ by major UPF corporations has driven inequity and undermines their claims that they are creating ‘value’ for diverse actors. Measures that protect population diets and food systems from the extractive forces of financialisation are likely needed as part of efforts to improve the healthiness of population diets.

Food mapping approaches for understanding food system transformations in rapid-growth city regions in the Global South

The world’s food systems are rapidly changing due to socioeconomic, environmental, and demographic changes, globalization, and urbanization. Urban regions connect urban food consumption with rural food production and are associated with rapid dietary transitions in developing counties. Despite urbanization being a key driver of city-regional and global food system transformations, city-regional food systems (particularly in developing countries) are under-researched. Although the importance of dynamic urban and peri-urban food systems has led to new frameworks and approaches for mapping food flows within urban regions, our study highlights both opportunities and limitations to food mapping in high-growth city regions in the Global South. We review existing approaches to food mapping using three contrasting city-regional food systems as case studies, namely, Bahir Dar (Ethiopia), Hanoi (Vietnam), and Cali (Colombia), and identify priorities for future progress. These include temporal dimensions of food access; nutritional outcomes of food flows; economic, cultural, and ethnic factors affecting consumer behavior; and how consumption of healthier foods could be enabled by decision-making throughout food supply chains. In addition, the roles of food loss and waste could also be more specifically considered. We conclude that providing a more comprehensive and nutrition-sensitive understanding of city-regional food systems can guide evidence-based interventions and activities to enable transitions to healthier, equitable, and more sustainable urban food systems.

Exploring Benefits and Barriers of Plant-Based Diets: Health, Environmental Impact, Food Accessibility and Acceptability.

Unhealthy dietary patterns are directly linked to the current Global Syndemic consisting of non-communicable diseases, undernutrition and climate change. The dietary shift towards healthier and more sustainable plant-based diets is essential. However, plant-based diets have wide intra differences; varying from vegan diets that totally exclude meat and animal products to traditional ones such as the Mediterranean diet and the new Nordic diet. It is acknowledged that plant-based diets may contribute simultaneously to improving population health as well as to decreasing the environmental impact of food systems. Evidence from cohort and randomized-controlled trials suggests that plant-based dietary patterns have beneficial effects on bodyweight control, cardiovascular health and diabetes prevention and treatment. On the other hand, micronutrient requirements may not be met, if some plant-based diets are not well-planned. Additionally, studies showed that lower consumption of meat and animal products results in lower environmental impacts. Consequently, plant-based diets could be a key factor to increase diet sustainability. This narrative review addresses the advantages of adherence to plant-based diets on human and planetary health considering strains and barriers to achieve this dietary transition, including cultural acceptability and affordability factors. Finally, potential intervention and policy recommendations are proposed, focusing on the update of current national food-based dietary guidelines.

Influence of Sex and a High-Fiber Diet on the Gut Microbiome of Alentejano Pigs Raised to Heavy Weights.

This study investigates the influence of sex and a dietary transition on the gut microbiota of a local Portuguese pig breed. Three groups of male Alentejano pigs (n = 10 each) were raised between ~40 and 160 kg LW. Group C included pigs that were surgically castrated, while the I group included intact ones; both were fed with commercial diets. The third group, IExp, included intact pigs that were fed commercial diets until ~130 kg, then replaced by an experimental diet based on legumes and agro-industrial by-products between ~130 and 160 kg. Fecal samples were collected two weeks before slaughter. The total DNA was extracted and used for 16S metabarcoding on a MiSeq® System. The dietary transition from a commercial diet to the experimental diet substantially increased and shifted the diversity observed. Complex carbohydrate fermenting bacteria, such as Ruminococcus spp. and Sphaerochaeta spp., were significantly more abundant in IExp (q < 0.05). On the other hand, castrated pigs presented a significantly lower abundance of the potential probiotic, Roseburia spp. and Lachnospiraceae NK4A136 group (q < 0.01), bacteria commonly associated with better gut health and lower body fat composition. Understanding the role of gut microbiota is paramount to ensure a low skatole deposition and consumers' acceptance of pork products from non-castrated male pigs.

Applying regression tree analysis to explore willingness to reduce meat and adopt protein alternatives among Australia, China and the UK

The increasing global demand for meat causes additional environmental and food security issues. Adoption of a healthy and sustainable diet through the reduction of meat consumption may represent one approach to tackle these problems. An online survey collected responses from meat-eaters in Australia (n = 503), China (n = 785) and the UK (n = 489) to review the importance of considering cross-cultural and demographic differences when investigating meat-eating behaviour. The aim of this study was to understand meat consumption habits and the associations between consumers’ willingness to reduce meat/ adopt protein alternatives (meat substitutes, edible insects, cultured meat), with the influence of age, gender and country. To aid interpretation and explore interrelationships between variables, regression tree analysis using the CHAID algorithm was used. Results found country to be the most influential factor in predicting changes to meat consumption and willingness to reduce meat/adopt alternatives. Overall, Australians, especially those aged 35–54, were significantly less willing to reduce and adopt alternatives compared to Chinese and UK consumers. Interestingly, Chinese males were more willing to reduce meat and adopt alternatives, whilst the opposite trend was found in the UK. Findings highlight the importance of considering cultural differences, age and gender when designing country specific meat reduction strategies. It also emphasises the need to introduce appropriate protein alternative categories that will help facilitate a dietary transition in a given country. Overall, regression tree analysis has proven to be a useful stats tool to help explain complex interrelationships (e.g., meat consumption with other psychographic behaviours) in the current study.

Ex Vivo Fermentation of Hay and Corn by Rumen Bacteria from Cattle and Sheep

Sheep are often utilized as a model ruminant, despite a lack of functional comparisons of rumen bacterial communities and responses during dietary transitions between sheep and cattle. Therefore, an ex vivo study was conducted to evaluate species differences. Rumen fluid was obtained from hay-fed sheep and cattle (n = 3 species−1). Mixed bacterial cell suspensions in buffered media containing 3% w/v ground hay, corn, or combinations (2:1, 1:2) of substrates were incubated (24 h; 39 °C). Suspension pH, lactate, volatile fatty acids (VFA), and digestibility were assessed, functional guilds enumerated, and amylolytic bacteria isolated. Lactate was fully utilized in all hay incubations, and pH did not differ between species (p &gt; 0.75). In contrast, digestibility, lactate accumulation, and pH decline were greater in bovine suspensions fermenting corn (p &lt; 0.01). Streptococcus bovis was the predominant bacteria regardless of species, but total amylolytic bacteria were 10-fold greater in bovine suspensions (p &lt; 0.01). Lactate-utilizing bacteria were 1000-fold greater in bovine than ovine suspensions (p &lt; 0.01). However, total VFA did not differ between species (p &gt; 0.28). Overall, these results demonstrate differential feed utilization capacities in rumen microbial communities of sheep and cattle as well as potential differences in rumen acidosis susceptibility.

Investigating the risk benefit balance of dairy consumption in the Danish population

Abstract Background Sustainability and health concerns are driving dietary shifts globally, including changes in consumption of dairy products. Dairy provides essential micronutrients e.g., calcium, iodine, and B12 vitamin, and are a source of high-quality protein. They have also been associated with increased risk of diseases. We estimated the health risk-benefit balance of changes in dairy consumption in the Danish population, formulated as three possible consumption scenarios. Methods We applied a risk-benefit assessment approach to compare the health impact of current consumption with the impact of three alternative scenarios (AS) of dairy consumption. We accounted for beneficial and adverse health impacts associated with dairy and micronutrients and estimated disability adjusted life years (DALY) caused or prevented by the theoretical changes in consumption. Data were collected from the Danish food consumption survey, literature and the Global Burden of Disease Study. Results Results showed that a decrease in consumption of dairy in the overall population from current intake to 270 g/day (AS1) would lead to a loss of 4,865 healthy years annually (3,434; 6,344). The health outcomes contributing more were intellectual disability (men) and type 2 diabetes (women). Negative impacts were larger in men than women. Decreasing consumption would also lead to a higher proportion of women below recommended intake of iodine and of children of calcium. In contrast, increasing consumption to 500g/day (AS2) or to estimated optimal consumption for each health outcome (AS3) would lead to a health benefit (3,853 and 11,354 DALYs averted, respectively). We will present results of scenario analyses and discuss impact of assumptions. Conclusions Our estimates emphasize the need to quantify impacts of dietary changes, including health risks and benefits. They will be useful to inform public health policies that consider both sustainability and health impacts of dietary transitions. Key messages • We estimate that the Danish population will loose approximately 5000 healthy life years annually if dairy intake is decreased from the current level. • We argue that our assessment provide quantitative evidence of the trade-offs of shifts in dairy product intake.

Behind the ‘creative destruction’ of human diets: an analysis of the structure and dynamics of the ultra-processed food manufacturing industry and implications for public health

Abstract Background The role of ultra-processed food (UPF) manufacturers in driving unhealthy diets is coming under increasing scrutiny. While many of the strategies used by UPF corporations to push for and maintain high levels of UPF consumption are well documented, there has been limited analysis of how the UPF industry has evolved over time. This study aimed to examine trends in the structure and dynamics of the UPF manufacturing industry as part of efforts to understand and address the political economic drivers of the global UPF dietary transition. Methods We used multiple methods to examine the structure and market dynamics of the UPF industry, according to an adopted structure-conduct-performance model. Quantitative methods were used to analyse diverse metrics (e.g., industry size, market concentration, profitability). Data were sourced from several business and market research databases, with periods of analysis based on available data. We conducted a narrative literature review to supplement findings from the quantitative analysis, including on corporate strategy. Results Our findings show that, since the late-1800s, the global UPF manufacturing industry has been instrumental in transforming food systems around the world to the extent that many are now heavily geared towards the consumption and production of UPFs. A key explanatory factor behind this trend is that a group of major UPF corporations have developed an extensive and highly profitable network of large, concentrated UPF markets. Our study also suggests that, since the 1980s, the same corporations have been increasingly prioritising the financial interests of their shareholders above other concerns. Conclusions Reversing the UPF dietary transition will likely require substantial changes to the structural and regulatory conditions under which food systems around the world operate, such that population and planetary health are actively promoted and incentivised. Speakers/Panelists Samuele Tonello Eurohealthnet, Brussels, Belgium

Health and sustainability impacts of scenarios of replacement of beef by pulses in two EU countries

Abstract Background High consumption of red meat is an important cause of burden of disease and environmental degradation globally. To motivate changes in food consumption and production, policymakers need evidence on the overall impact of such changes on the health of citizens, and on all aspects of sustainability: environment, socioeconomics, and culture. Methods Using three different approaches, we compared the impact of four scenarios of replacement of beef consumption with pulses (a well-established plant protein source) in two EU countries, Portugal and Denmark. First, health impacts were quantified in disability-adjusted life years (DALY); second, sustainability impact was measured using various social, economic and environmental indicators. Finally, we used MACBETH (Measuring Attractiveness by a Categorical Based Evaluation Technique), an interactive, iterative, multicriteria decision analysis approach, to create a quantitative value model. Results We estimated positive health impacts for all substitution scenarios in the two populations. Positive impacts were larger for Denmark and ranged from 5,9 DALYs (25% substitution of beef by pulses in Portugal) to 39,7 DALYs averted/100,000 people (100% substitution, Denmark). The two countries had positive economic impacts, but beef production was more resilient than pulses. Environmental and social impacts of beef production were consistently higher than pulses. The MCDA model included a set of 15 criteria within the four dimensions of analysis to assess the overall value of implementing each scenario. Conclusions Individually, each approach allowed us to compare health, sustainability and integrated impacts of different options for food substitutions relevant to the sustainability agenda. Together, they allowed us to create a platform for discussing the co-benefits of dietary changes in different contexts. Expanding this work to other dietary changes and countries will support further development of public health policies. Key messages • Different possible scenarios of substitution of beef consumption by pulses, an alternative plant-based protein source, will lead to overall positive health and sustainability impacts. • Quantitative measurements of the integrated health, environmental and socioeconomic impacts of dietary transitions will support development of public health policies towards sustainable diets.

The estimated health impact of sustainable diets in the Danish population: a risk-benefit assessment

Abstract Background To mitigate the climate emergency and support a growing world population, sustainable diets have become a popular topic. These plant-forward diets are promising in terms of health effects, but estimated population health impacts linked to changes in nutrition and exposure to food contaminants have yet to be quantified. We used a risk-benefit assessment (RBA) to quantify the net health impact of theoretical dietary changes. Methods We collected dietary consumption data from the Danish National Survey of Diet and Physical Activity, exposure data for selected chemical contaminants (cadmium, methyl mercury, lead, and inorganic arsenic) from Danish food monitoring, and dose-response data for various health outcomes from published epidemiological data. The average Danish diet was compared to multiple dietary scenarios: a Danish-adjusted EAT-Lancet diet and other alternative scenarios that looked at proportional decreases in animal-based foods with plant-based substitutions. Results Shifting to a Danish-adjusted EAT-Lancet diet would require increased consumption of legumes by 6,352%, nuts by 1,036%, bread and cereals by 100%, fruits and berries by 40%, and fish and shellfish by 39%. Red meat and dairy consumption would need decreases of 83% and 25%, respectively. With these changes, we estimated that a net of 22,900 DALYs would be averted in one year in the Danish population. The food groups contributing most to positive health impacts were nuts (-7,721 DALYs), bread and cereals (-6,244), decreased red meat (-5,681), legumes (-2,509), and fruits and berries (-1,396). These results are preliminary; all scenarios will be compared. Conclusions Our results support a beneficial impact on the health of the Danish population due to sustainable dietary transitions. Similar benefits are expected for other populations across Europe. We argue that RBAs are a powerful decision-support tool and can provide quantitative evidence for sustainable diets and future interventions. Key messages • Our comprehensive risk-benefit assessment concluded that transitioning towards a more sustainable diet leads to positive health impacts. • Our conclusions support policy and decision makers in implementing plant-forward dietary recommendations and agendas in the Danish population.

Nitrogen balance in dairy cows fed low-nitrogen diets based on various proportions of fresh grass and maize silage.

To ensure sustainable and efficient production, dairy farms must reduce their environmental impacts and nitrogen losses, which are sources of pollution, while increasing their feed self-sufficiency. Grass-based dairy systems, frequently combine fresh grass with maize silage when grass is scarce or during dietary transitions. However, the effects of combining fresh grass and maize silage on cow performance and N excretion are poorly known. This study aimed to quantify the effects of increasing the proportion of maize silage in a fresh grass diet on cow N flows and metabolism, in the context of grass-based dairy systems. Four proportions of maize silage in a fresh grass diet (objectives of 0, 17, 34 and 51% DM of maize silage) were investigated. The experiment was performed in a 4×3 Latin square design using eight lactating cows during three 3-week periods. DM intake (DMI), milk yield, faeces and urine outputs, and their N concentrations were measured for each cow. The fresh grass CP concentration was lower than planned (106±13.0g/kg DM). This resulted in very low dietary CP concentration, which decreased from 108 to 86g/kg DM when maize silage in the diet increased from 0 to 51% DM, respectively. DM intake and milk yield both decreased linearly by 3.3kg/day from 0 to 51% DM of maize silage in the diet. Thus, N intake decreased linearly by 100g/day from 0 to 51% DM of maize silage in the diet. The N concentration of milk was highest for the diet with 0% DM of maize silage. Nitrogen excreted in faeces and urine decreased linearly by 29 and 23g/day, respectively, from 0 to 51% DM of maize silage in the diet. The low dietary N concentration resulted in low ruminal NH3-N concentrations (8mg/L, on average) and urinary urea excretion (down to 8% urea N in urinary N). Increasing the proportion of maize silage in an unusually low-N grass diet, without protein-rich concentrates, induced highly N-deficient diets with minimal N losses in faeces and urine but large and unsustainable decreases in DMI and milk yield.

Therapeutic advancement in inflammatory bowel disease by incorporating plant-based diet.

Identification and recognition of the ubiquitous environmental factor are prerequisite for treatment and prevention of the disease. The biggest problem with current practice in inflammatory bowel disease (IBD) is the lack of a widely appreciated ubiquitous environmental factor for the disease. The incidence of IBD is associated with dietary transition from a traditional diet to the current (westernized) diet. Prospective cohort studies and case-control studies indicate that the current diet is a risk factor for IBD. The current diet tends to cause gut microbial dysbiosis resulting in a pro-inflammatory state. Therefore, we regard our current diet as this factor. Even nutritionally balanced meals are unable to suppress relapse, particularly in Crohn's disease (CD). Therefore, we developed a plant-based diet (PBD) (lacto-ovo-semi-vegetarian diet) to counter the current diet. By incorporating the PBD into practice, we achieved far better outcomes in both ulcerative colitis (UC) and CD in both the induction and quiescent phases compared to the current standard therapy. All patients were treated on an inpatient basis and provided with a PBD. CD is far more untenable than UC and is destined to follow a disabling course. Therefore, infliximab was indicated in all patients with CD, but only in severe cases with UC. This infliximab and PBD as first-line (IPF) therapy broke the barrier of primary nonresponders to biologics (around 30%): the remission rate was 96% (44/46) in CD and 76% (13/17) in severe UC. A PBD can induce remission without medication in approximately one-third of mild cases of UC. All patients were advised to adhere PBD after discharge. In CD, a relapse-free outcome was achieved in nearly a half of patients (52%) at 10-year follow-up without biologics or immunosuppressants. Cumulative relapse rates for 51 initial episode cases of UC (18 mild, 30 moderate, 3 severe) at 1 and 5 years were 14% and 27%, respectively. We believe our assertion that the current diet is the ubiquitous environmental factor underlying IBD is correct and a PBD is right diet for the disease.

Identifying and understanding dietary transitions and nutrient deficiency from loyalty card digital footprints

Introduction &amp; BackgroundThe shift towards plant-based diets remains on the rise. Several observational studies have suggested that adopting these diets can result in some fundamental nutrient deficiencies, such as iodine deficiency. This can be especially harmful to a developing fetus, leading to growth impairment and, in extreme cases, cretinism. Nonetheless, understanding of long-term health consequences of this shift remains a challenge, particularly regarding nutritional impact at broader population scales.&#x0D; Objectives &amp; ApproachOur study focuses on the effects of transitioning to plant-based diets on the purchasing and assumed intake of essential nutrients like iodine, calcium, and vitamin B12. We analysed anonymized shopping records of 10,626 loyal customers who switched from regular milk to alternative milk products. By matching the transaction data with nutritional information, we estimated the weekly nutrient purchases before and after the transition. Our data was collected from a national food retailer across the UK.&#x0D; Relevance to Digital FootprintsLoyalty-card transactional logs held by retailers reflect a valuable lens into nutritional intake data. This data can provide insight into the potential impact of purchasing behaviours, such as the potential health effects of dietary changes at scale. Our approach leverages AI modelling accompanied by rigorous variable importance methods to uncover potentially hidden insights on the impact of nutritional shifts to plant-based goods.&#x0D; ResultsResults indicate that 83% of individuals deemed regular customers, who switched to plant-based milk, experienced a decrease in their purchases of iodine (44%), calcium (30%), and vitamin B12 (39%) from their normal purchase patterns at the retailer. Additionally, 57% of these individuals decreased their iodine purchases by more than 50%. The reduction in these nutrients is even more significant for those who switch to plant-based dairy and meat products.&#x0D; Conclusions &amp; ImplicationsOur research indicates that dietary changes, such as switching from purchasing regular milk to alternative milks, may lead to insufficient intake of essential dietary nutrients such as iodine. This represents a significant potential health concern for the public if not remediated, especially in countries that do not require salt to be fortified with iodine.

Dietary Transitions Toward Sustainable Horse Feeding.

Sustainability is the balancing act of optimizing the use of current resources without compromising the current or future environment. Within the agriculture sector the primary focus of sustainability has been to reduce environmental pollution, specifically greenhouse gasses (GHG) emissions, nitrogen emissions, and leaching. For the equine industry the first step towards sustainability is the documentation and critique of current feeding and management practices to permit modifications to enable the industry meet social and legislative obligations. As a monogastric hindgut fermenter on a per kg bodyweight basis the horse has relatively lower GHG emissions compared to ruminants. However, there are several opportunities to further reduce the environmental impact of the equine industry. The majority of these relate to subtle changes, or consideration of, improving feed conversion, using alternative ingredients, and management of fecal material associated with intensive husbandry. To initiate the journey towards sustainability this review documents opportunities with current equine feeding and management practices to reduce the environmental impacts of the equine industry.

Potential impact of time trend of whole grain intake on burden of major cancers in China

Numerous studies have revealed associations between high intake of whole grains and reduced risk of various cancers. Yet, in recent decades, the traditional Chinese diets have been challenged by reduction in whole grains and increase in refined grains. To assess the impact of this dietary transition on cancer prevention, we analyzed the time trend of whole grain intake using nationally representative sampling data of over 15 thousand individuals from the China Health and Nutrition Survey. We applied the comparative risk assessment method to estimate the population attributable fraction of cancers due to insufficient whole grain intake from 1997 to 2011 and projected the trend of whole grain intake and the associated burden of cancers to 2035. We found a significant decrease of approximately 59% of whole grain intake in the Chinese population from 1997 to 2011. Compared with 1997, insufficient intake of whole grains was responsible for 9940 more cases of breast cancer, 12,903 more cases of colorectal cancer and 434 more cases of pancreatic cancer in 2011. Our projections suggest that if every Chinese would consume 125 g whole grain per day as recommended by the latest Chinese Dietary Guidelines, 0.63% bladder cancer, 8.98% breast cancer, 15.85% colorectal cancer, 3.86% esophageal cancer, 2.52% liver cancer and 2.22% pancreatic cancer (totaling 186,659 incident cases) could theoretically be averted by 2035. Even if everyone maintained the 2011 whole grain intake level, an estimated 8.38% of cancer events could still be prevented by 2035.

Differences in the inflammatory proteome of East African and Western European adults and associations with environmental and dietary factors.

Non-communicable diseases (NCDs) are rising rapidly in urbanizing populations in sub-Saharan Africa. Assessment of inflammatory and metabolic characteristics of a urbanizing African population and the comparison with populations outside Africa could provide insight in the pathophysiology of the rapidly increasing epidemic of NCDs, including the role of environmental and dietary changes. Using a proteomic plasma profiling approach comprising 92 inflammation-related molecules, we examined differences in the inflammatory proteome in healthy Tanzanian and healthy Dutch adults. We show that healthy Tanzanians display a pro-inflammatory phenotype compared to Dutch subjects, with enhanced activity of the Wnt/b-catenin signalling pathway and higher concentrations of different metabolic regulators such as 4E-BP1 and fibroblast growth factor 21. Among the Tanzanian volunteers, food-derived metabolites were identified as an important driver of variation in inflammation-related molecules, emphasizing the potential importance of lifestyle changes. These findings endorse the importance of the current dietary transition and the inclusion of underrepresented populations in systems immunology studies.

The iodine content of Faroese food items to support iodine nutrition in the North Atlantic

ABSTRACT Iodine is essential for human health, and dietary iodine sources are critical. Living isolated on islands in the North Atlantic Ocean fostered unique dietary traditions in the Faroe Islands. The dietary peculiarities led us to collect and measure the iodine content of local foods and beverages and calculate daily iodine intakes based on four Faroese dietary scenarios. Marine foods and birds had iodine contents from 300 µg/kg and up, markedly higher than dairy, grains, terrestrial, vegetables, and liquid foods (p<0.001). Vegetables and beverages contained negligible iodine. Wind-dried fermented lamb meat iodine content varied by 100% depending on whether it was herded on an island with beaches (105 µg/kg) or with cliffs (53 µg/kg) facing the ocean. The daily iodine intake varied from around 50 µg to just over 200 µg with diets rich in fish and whales. In conclusion, the traditional diet has been a critical source of iodine on the Faroe Islands. The Faroese may be iodine replete with traditional diets but face the risk of iodine deficiency with dietary transition towards a more western diet. Locally produced Faroese foods are therefore relevant to promote health, and may additionally support food security, local involvement and knowledge, and long-term sustainability.

Effect of NDF levels of complete pelleted diet and dietary transition period on rumen pH, growth performance, digestibility, and blood indices in fattening male goats

This study aimed to evaluate the effects of low and high NDF levels in complete pelleted diets (CPD) on early diet transition in fattening male goats. Forty male goats were blocked by their initial body weights (BW), and within each block, animals were randomly assigned to one of the four diets using a randomized complete block design. The treatments were arranged in a 2 × 2 factorial comprising of two levels of NDF (20.2% and 32%) and two diet transition strategies (day 7 and 15). All the diets were iso-nitrogenous, having a 15:85 forage-to-concentrate ratio. In the high NDF diet, a higher level of 32% was achieved by replacing corn grain with soy hulls and wheat bran. The goats were housed individually and had ad libitum access to feed and water. During the transition phase, conventional feeding was replaced by the CPD in three steps, and thereafter, all animals had free choice access to their respective diets. Body weight and blood samples were conducted weekly, while rumen samples were collected on day 0, 7 and 15, and then fortnightly. Feeding behavior data was recorded on day 7 during the transition period using video cameras. Nutrient digestibility was performed twice, with n = 4 animals/treatment: 1) after 15 days and 2) at the end of the study. The results revealed that goats fed on a high NDF diet had higher (P < 0.05) DMI and ADG than those fed on a low NDF diet during the transition. Additionally, there was an interaction between NDF and transition days after the transition period and the entire study period. The feed-to-gain ratio was lower (P = 0.05) in goats fed on the LNDF-15 compared with the LNDF-7. The rumen pH of low NDF-7 goats was lower (P < 0.05) throughout the study compared with other treatments. Moreover, the odds for diarrhea were higher (P = 0.03) in the low NDF-7 goats compared to other treatments during and after the diet transition. Male goats fed on a high NDF diet had higher (P < 0.05) nutrient digestibility after transition, but no effect thereafter. Animals fed on a high NDF diet had higher (P < 0.05) DMI, NDF intake, laying, standing time, and rumination time during the diet transition period. Feeding behavior was not recorded after the dietary transition period. In conclusion, feeding HNDF-7 to goats during the diet transition period resulted in improved growth performance, key feeding behavior parameters, and nutrient digestibility. Whereas, during the post-diet transition period, both LNDF-15 and HNDF-7 goats displayed comparable growth performance without any adverse effects on animal health.

How and why ultra-processed foods harm human health.

The analysis of food using a perspective centred on nutrients seems inadequate for understanding the dietary transition and its impact on the growth of obesity and chronic diseases. Industrial food processing is now proposed as the key to explain the relationship between food and health. The NOVA food classification considers the degree and the purpose of food processing, which includes physical, biological and chemical processes used after foods are separated from nature, and before being consumed or prepared as dishes and meals. NOVA has four food groups: (1) unprocessed and minimally processed foods; (2) processed culinary ingredients; (3) processed foods and (4) ultra-processed foods, which are formulations made mostly or entirely from substances derived from group 1 foods and additives, with little if any intact group 1 food. Many investigations linking high ultra-processed food consumption with deterioration of diets and adverse health outcomes are reinforced by prospective studies, systematic reviews and meta-analyses. There are various plausible explanations of why diets high in ultra-processed foods are harmful. Their production and consumption continue to rise worldwide. Efficient and effective public policies and actions that reduce production and consumption of ultra-processed products are needed, to protect human health now and in future.

Assessing the environmental impact of diet – Influence of using different databases of foods' environmental footprints

Current food systems compromise many environmental impact boundaries, and a dietary transition towards sustainable dietary patterns is needed. The definition of policies to promote the dietary transition implies accurate knowledge of dietary choices' environmental impact. For its assessment, life cycle assessment (LCA) has been employed, but methodological heterogeneity and limited access to LCA data hinder comprehensive comparisons. Several publicly accessible standardized foods’ environmental impact databases have been developed to address these challenges. However, variations in indicators included and data sources raise questions about their impact on assessing dietary environmental footprints and the correlation amid various indicators within and between databases. This study aims to evaluate the effect of using different public-access food LCA databases on estimating the individual dietary environmental impact in a nationally representative survey through multiple indicators as well as the correlations between them.Food-specific environmental impact indicators data from three databases (Poore&Nemececk, SHARP-ID, SU-EATABLE LIFE) were merged with individual food consumption data from the Portuguese Food, Nutrition, and Physical Activity Survey (IAN-AF, 2015–2016) (n = 5811) to estimate the usual environmental impact of diet for each indicator. Food groups' percentual contribution (%) to the environmental footprints and the Pearson correlation between indicators were also estimated.Our results showed that different databases of foods’ environmental impacts led to diverse estimates for common indicators when linked to the same food consumption data (e.g., GHGE – P50(P25–P75) SHARP-ID: 4.42(3.44–5.64)kgCO2eq, Poore&Nemececk: 6.17(4.46–8.41)kgCO2eq, SU-EATABLE LIFE: 5.64(4.26–7.36)kgCO2eq). However, except for water footprints, most indicators from all databases were highly correlated with each other, with meat and other animal-based foods as the top contributors.In conclusion, the absolute differences observed can compromise the validity of the findings and their comparability with other countries' estimates when different LCA data are used. A standardized, consolidated database covering a judicious selection of indicators across Europe along with official guidelines for assessing dietary environmental impacts would facilitate its assessment benefiting the establishment of food sustainability policies and recommendations at national and pan-European levels.