Ultra-processed Food Intake Research Articles

Ultra-Processed Foods and the Impact on Cardiometabolic Health: The Role of Diet Quality.

The consumption of ultra-processed foods (UPFs) has surged globally, raising significant public health concerns due to their associations with a range of adverse health outcomes. This review aims to elucidate potential health impacts of UPF intake and underscore the importance of considering diet quality when interpreting study findings. UPF group, as classified by the Nova system based on the extent of industrial processing, contains numerous individual food items with a wide spectrum of nutrient profiles, as well as differential quality as reflected by their potential health effects. The quality of a given food may well misalign with the processing levels so that a UPF food can be nutritious and healthful whereas a non-UPF food can be of low quality and excess intake of which may lead to adverse health consequences. The current review argues that it is critical to focus on the nutritional content and quality of foods and their role within the overall dietary pattern rather than only the level of processing. Further research should dissect health effects of diet quality and food processing, investigate the health impacts of ingredients that render the UPF categorization, understand roles of metabolomics and the gut microbiome in mediating and modulating the health effects of food processing, and consider environmental sustainability in UPF studies. Emphasizing nutrient-dense healthful foods and dietary patterns shall remain the pivotal strategy for promoting overall health and preventing chronic diseases.

Food consumption patterns and Framingham cardiovascular risk score among shift workers: A NOVA-based approach

ObjectiveTo evaluate the association between dietary quantity and variety, by extent and purpose of processing, and Framingham cardiovascular disease (CVD) risk score among rotating shift workers. MethodsThe cross-sectional study included male shift workers. Dietary intake was assessed using a 24-hour recall method conducted by trained interviewers. Food items were classified using two approaches: the first was based on the amount of food consumed in each food group. Fruits, vegetables, and legumes (FVL) intake, is classified as recommended at 400g per day by WHO guidelines. Ultraprocessed foods (UPFs) were analyzed based on tertiles of daily caloric contribution. The second approach, the NOVA dietary diversity score (DDS-NOVA) assessed the variety of consumed items within each food group, assigning points for each unique item consumed, irrespective of quantity or frequency. The CVD-risk score was evaluated using the Framingham coronary heart disease risk score, categorizing participants as low risk (<5%) or intermediate to high risk (>5%). Descriptive, univariate, and multivariate logistic regression were used, with adjustments made for age, skin color, schooling, duration of shift work, physical activity, BMI and total caloric intake. ResultsThe study involved 213 participants, with an average age of 38.67 years (±6.96), a minimum of 26 and a maximum of 60. The majority (62.4%) were between 30 and 40 years old; 49.3% identified themselves as brown; 56.8% had completed high school; and 79.3% were married. The Framingham CVD-risk score indicated that 56.2% were at low risk (<5%) and 43.7% at intermediate to high risk (≥5%). The average consumption of FVL was 272.32g (±350.43), with 70.4% meeting the recommendation of ≥400g/day. Participants consumed an average of 3.46 fresh food items, 3.74 minimally processed food items, 2.54 processed food items and 3.39 ultra-processed food items. In the multivariate model, consuming ≥400g/day of FVL reduced the likelihood of cardiovascular risk ≥5% by 2.12 times (OR: 0.47; 95%CI: 0.23-0.98). Each additional item of fresh food reduced the risk by 49% (OR: 0.67; 95%CI: 1.01-1.66), while each additional item of ultra-processed food increased the risk by 30% (OR: 1.30; 95%CI: 0.52-0.87). There was no significant association between the calorie intake of ultra-processed foods and cardiovascular risk. ConclusionBoth adequate consumption of FVL quantity and a greater variety of fresh-foods were associated with a lower chance of CVD-risk, while a higher variety of consumption of UPF items increased this chance.

Making Sense of the Relationship Between Ultra-Processed Foods, Obesity, and Other Chronic Diseases

Ultra-processed foods (UPFs) is a food category within the NOVA system. The key feature of UPFs are foods that have been highly processed and contain various additives, especially those that are industrially produced. It is claimed that UPFs are inherently unhealthy. The classification system is highly controversial. This paper critically evaluates the evidence. In stark contrast to conventional systems for food classification, the NOVA system disregards the nutritional values of foods. As a result, many foods generally considered to be healthy are included as UPFs, whereas many unhealthy foods are excluded. Epidemiological studies, mainly prospective cohort studies, have consistently reported an association between the intake of UPFs and risk of obesity, cardiovascular disease (CVD), type 2 diabetes, common mental disorders (especially depression), and all-cause mortality. A similar association has been reported for cancer and hypertension, but the supporting evidence is weaker. The most plausible explanation for this is that the associations are largely due to a limited number of unhealthy foods, such as processed meat and sugar-sweetened beverages. Studies of the relationship between UPFs and obesity present a different picture. There is much evidence that suggests that UPFs play a major causal role in obesity. The high contents of fat, sugar, carbohydrates, and sodium commonly present in UPFs makes these foods hyperpalatable. In addition, UPFs typically have a high energy density. As a result of these two features of UPFs, most people consume an excessive energy intake when presented with UPFs. Because UPFs include a wide range of foods, many of which are healthy, it is likely that while many UPFs are obesogenic, many others are not.

Adults perceive similar ultra-processed and minimally processed foods as having different levels of healthfulness: Development of stimuli for an ultra-processed food-related implicit association task.

Background: Ultra-processed food (UPF) consumption is excessive across the United States (US). Understanding perceptions of food based on processing is critical to elucidate reasons for UPF intake and inform tool development for measuring related cognition. Aim: Design and evaluate perceptions of UPF and non-UPF food among general US adults. Hypothesis: Significant differences exist in perceived healthfulness across similar UPF and non-UPF foods. Methods: Photographs of foods were taken to represent eight pairs of similar UPFs and non-UPFs and presented in a Qualtrics survey with questions to gauge healthfulness from 0 to 10 (0 = completely unhealthy, 10 = completely healthy). Paired-samples sign tests were used to detect differences in ratings within pairs. Results: Participants (n = 100) rated stimuli within all pairs significantly differently (P < 0.001), indicating different perceptions of UPF and non-UPF. Conclusion: Adults perceive similar UPF and non-UPF as having different levels of healthfulness. Reasons for these differences warrant investigation.

Evaluating the impact of the universal infant free school meal policy on the ultra-processed food content of children’s lunches in England and Scotland: a natural experiment

BackgroundThe Universal Infant Free School Meal (UIFSM) policy was introduced in 2014/15 in England and Scotland for schoolchildren aged 4–7 years, leading to an increase in school meal uptake. UK school meals are known to be healthier and less industrially processed than food brought from home (packed lunches). However, the impact of the UIFSM policy on the quantity of ultra-processed food (UPF) consumed at school during lunchtime is unknown. This study aimed to evaluate the impact of the UIFSM policy on lunchtime intakes of UPF in English and Scottish schoolchildren.MethodsData from the UK National Diet and Nutrition Survey (2008–2019) were used to conduct a difference-in-difference (DID) natural experiment. Outcomes included school meal uptake and the average intake of UPF (% of total lunch in grams (%g) and % total lunch in Kcal (%Kcal)) during school lunchtime. The change in the outcomes before and after the introduction of UIFSM (September 2014 in England, January 2015 in Scotland) in the intervention group (4–7 years, n = 835) was compared to the change in an unexposed control group (8–11 years, n = 783), using linear regression. Inverse probability weights were used to balance characteristics between intervention and control groups.ResultsBefore UIFSM, school meal uptake and consumption of UPFs were similar in the intervention and control groups. The DID model showed that after UIFSM, school meal uptake rose by 25%-points (pp) (95% CI 14.2, 35.9) and consumption of UPFs (%g) decreased by 6.8pp (95% CI -12.5,-1.0). Analyses indicated this was driven by increases in minimally processed dairy and eggs, and starchy foods, and decreases in ultra-processed salty snacks, bread and drinks. The differences were larger in the lowest-income children (-19.3 UPF(%g); 95% CI -30.4,-8.2) compared to middle- and high-income children. Analyses using UPF %Kcal had similar conclusions.ConclusionsThis study builds on previous evidence suggesting that UIFSM had a positive impact on dietary patterns, showing that it reduced consumption of UPFs at school lunchtime, with the greatest impact for children from the lowest-income households. Universal free school meals could be an important policy for long term equitable improvements in children’s diet.

Ultra-processed food consumption is associated with the acceleration of biological aging in the Moli-sani Study

BackgroundHealthy diets have been inversely associated with biological aging. However, the nutritional content is only one aspect of the overall food health potential, and more recently, increasing attention has been paid to nonnutrient food characteristics, such as food processing. ObjectivesTo examine the association of ultra-processed food (UPF) consumption with biological aging measured by circulating blood biomarkers. MethodsCross-sectional analyses were conducted on 22,495 participants enrolled in the Moli-sani Study (2005–2010, Italy). Food intake was assessed by a 188-item food frequency questionnaire. UPF was defined according to the Nova classification and calculated as the ratio (weight ratio; %) between UPF (g/d) and total food eaten (g/d). Diet quality was assessed by the Mediterranean Diet Score (MDS; ranging 0–9). A deep neural network approach based on 36 circulating biomarkers was used to compute biological age (BA), and the resulting difference (Δage = BA − chronological age)—an index of biological aging—was tested as dependent variable in multivariable linear regression analyses including known risk factors. ResultsThe mean Δage in this population was −0.70 (standard deviation ±7.70) years. In multivariable-adjusted analyses, higher intake of UPF was associated with accelerated Δage [β = 0.34 years; 95% confidence interval (CI): 0.08, 0.61 for the last fifth compared with the first). This association was not linear (P value for overall association <0.001; P value for nonlinearity = 0.049). Inclusion of the MDS into the model slightly attenuated this association by 9.1% (β = 0.31 years; 95% CI: 0.04, 0.59). ConclusionsA diet rich in UPF was associated with an acceleration of biological aging in a large sample of Italian adults. The poor nutritional composition of highly processed foods weakly accounted for this association, suggesting that biological aging could be adversely influenced by nonnutrient characteristics of these foods.

Food Insecurity Is Common in Patients with Inflammatory Bowel Disease and Is Associated with Increased Ultra-Processed Food Intake.

Food insecurity (FI) is defined as the lack of consistent access to enough food for an active and healthy life. FI affects over 30 million Americans and is associated with poor clinical outcomes and impaired quality of life and drives significant health inequities. Despite the rising prevalence of FI and the federal focus on improving access to healthy food, there is a paucity of research on FI in patients with inflammatory bowel disease (IBD). Therefore, the goal of this study was to define FI in a cohort of IBD patients and determine whether FI was associated with changes in dietary patterns, including specifically an increase in ultra-processed food (UPF) consumption in this high-risk patient population. This was a single-center, retrospective cohort study of patients with a diagnosis of IBD who were 18 years of age or older and who were seen in a nutrition focused clinic. Patients were screened for FI using the Hunger Vital Sign™, a 2-question validated FI screening tool and underwent a 24-h dietary recall. The degree of food processing was assessed using the NOVA Food Classification System. Among 128 patients with IBD, we observed that FI is increasingly prevalent, with 45% of patients reporting difficulty with sufficient grocery access at least "sometimes" in the last 12 months and 10% reporting decreased food access "often" in the prior year. In addition, the patients at high-risk for FI were significantly more likely to eat NOVA 4 UPFs (54% vs. 27%, p = 0.001) and were significantly less likely to eat NOVA 1 unprocessed foods (32% vs. 61%, p = 0.001) as compared to those not at risk for FI. Finally, only a small percentage of those at highest risk for FI were enrolled in a federal food assistance program for grocery support. The prevalence of FI is increasing in patients with IBD and is associated with reduced dietary quality.

Consumption of ultra-processed foods and dental caries in Brazilian adolescents

This study aimed to evaluate the association between ultra-processed food (UPF) and dental caries, considering muscle mass (MM), bone mineral density (BMD), and oral hygiene habits (OHH) as mediators. This study has an analytical cross-sectional design with 2,515 adolescents (18–19 years). The main exposure – the UPF intake ratio – was established using the food frequency questionnaire. The outcome was the number of decayed teeth, according to the DMFT index. The model adjustment included socio-economic status (SES), frequency of physical activity, and concurrent risk habits (CRH) as potential confounders. Three latent variables were considered: SES (family income, economic class, household head, and adolescent education), OHH (gingival bleeding on probing index and visible plaque index), and CRH (alcohol and tobacco dependence). The analyses used structural equation modeling, estimating the standardized coefficient (SC) in three models: lumbar BMD(1), femoral BMD(2), and total BMD(3). UPF consumption had a direct (SCmodel1=0.071, SCmodel2=0.072, SCmodel3=0.071; p < 0.05) and total (SCmodel1=0.067, SCmodel2=0.068, SCmodel3=0.068; p < 0.05) effect on the number of decayed teeth. BMD and MM did not mediate the association between UPF and dental caries, but the indirect association mediated by OHH was significant in all analyses (p < 0.05). Dental Caries was explained in other specific pathways: SES→UPF→Dental Caries (SCmodel1 = 0.009, SCmodel2 = 0.008, SCmodel3 = 0.009); SES→OHH→Dental Caries (SCmodel1 = 0.033, SCmodel2 = 0.033, SCmodel3 = 0.034); CRH→UPF→Dental Caries (SCmodel1 = 0.009, SCmodel2 = 0.008, SCmodel3 = 0.008); CRH→OHH→Dental Caries (SCmodel1 = 0.029, SCmodel2 = 0.027, SCmodel3 = 0.027). Dental caries prevention should include encouraging good OHH, healthy eating, and developing equitable public policies in middle and low-income countries like Brazil.

A review on dietary approaches to enhance calcium intake among adolescents

Adolescence is one of the most important milestones in the life cycle stages, in which each individual undergoes various physiological and psychological changes. This period is considered one of the important stages of nutritional vulnerability. Calcium needs are elevated due to intensive bone and muscular development. Calcium acts as one of the vital minerals for bone mineralization during childhood and adolescence that primarily needs to be driven through adequate dietary sources. Globally, calcium intake in all age groups including adolescents has lowered due to changing food patterns which have highly tilted towards a high intake of ultra-processed foods. This review draws attention to enhanced calcium intake through healthy dietary measures.

Ultra-processed food intake and type 2 diabetes: A dose-response meta-analyses of prospective studies

Abstract Studies suggested a positive association between ultra-processed food (UPF) intake and risk of type 2 diabetes (T2DM). However, the magnitude of association varies across studies due to differences in population characteristics and methodological issues. It is also unclear about the exact shape of the association and whether the association is independent of diet quality and adiposity. We conducted a dose-response meta-analysis of prospective studies to summarize the association between UPF intake and T2DM risk. PubMed/MEDLINE, Web of Science, and Embase were searched through Jan. 2024 to identify relevant studies. Using random-effects models, summary relative risks (RRs) and 95% confidence intervals (CIs) were estimated for each of the following unit increment in UPF intake: 10% (of total g/d), 100-g/d, and 1-serving/d. A non-linear dose-response meta-analysis was conducted using restricted cubic spline analysis. After screening 569 publications, 12 prospective cohort studies were included in this study. The summary RRs associated with every 10%, 100-g, and 1-serving increment in UPF intake were 1.13 (95% CI = 1.10-1.16), 1.05 (95% CI = 1.03-1.06), and 1.04 (95% CI = 1.03-1.05), respectively. The positive associations remained statistically significant after additional adjustment for diet quality, BMI, and total energy intake. The dose-response curve for g/d of UPF intake suggested evidence of nonlinearity (p-nonlinearity=0.0005), showing a steeper increase in risk at UPF intake &amp;gt;300 g/d. However, evidence for non-linearity was not observed with % and serving/d of UPF intake. The association did not significantly vary by method and timing of UPF assessment. Higher summary RRs were observed among studies from Europe and North America compared with those from other countries (p-heterogeneity=0.048). Our data suggest that higher UPF intake may increase T2DM risk, independent of diet quality and adiposity. Key messages • Higher intake of ultra-processed food is positively associated with the risk of type 2 diabetes. • Public health strategies should encourage healthier dietary choices by emphasizing reduction of UPF intake in dietary guidelines and implementing regulations on manufacturing and labeling of UPF.

Ultra-processed food consumption and risk of coronary heart diseases: UK Whitehall II cohort study

Abstract In recent decades, ultra-processed foods (UPFs) intake has increased drastically, sparking concerns about their potential impact on cardiometabolic diseases. However, large-scale cohort studies tracking UPF consumption at multiple time points remain limited. This study explores the prospective association between repeated measures of UPF intake and the risk of coronary heart disease (CHD), along with its secondary endpoints, within the UK Whitehall II study. The analytical sample tracked 7,138 midlife British participants without CHD from baseline. UPF consumption was measured using validated food frequency questionnaire (127 items) and classified by the NOVA system during three phases: 1991/1994 (phase 3), 1997/1999 (phase 5), and 2002/2003 (phase 7). This study assessed the onset of CHD and its secondary endpoints, including CHD and all-cause mortality, through medical exams and hospital records up to 2016 and 2021, respectively. Cox proportional hazards regression models adjusted for socio-demographics, lifestyle factors and total energy intake were used to explore the prospective association between cumulative average UPF intake (in quintiles) and CHD outcomes. During a median follow-up of 13 and 19 years, 589 cases and 1,314 deaths were documented. In multivariable adjusted cox models, the highest UPF consumption quintile versus the lowest quintile was associated with higher CHD incidence [HR:1.26; 95% Confidence Interval (CI): 1.02-1.55; p = 0.03]. Additional adjustment of total energy intake increased the CHD risk by 28% [HR:1.28; 95% CI: 1.03-1.58; p = 0.02]. No significant relationships were found between cumulative average UPF intake and CHD or all-cause mortality. In UK midlife adults, higher UPF intake is prospective associated with increased CHD risk. Although additional research is warranted, these findings emphasize the importance of public awareness and food policy interventions to reduce UPF intake for alleviating the population burden of CVD. Key messages • Our study suggests the need for increased efforts to implement population wide strategies on regulating food processing, such as taxation and front of package warning labelling of UPF. • Our study emphasizes UPF’s role in cardiovascular prevention, highlighting the need for nutrition counseling on UPF consumption for those at risk of CVD.

Investigating the diverse role of ultra-processed foods on cardiometabolic multimorbidity: Highlights from the ATTICA prospective study (2002-2022)

Abstract Background/Introduction The role of ultra-processed foods (UPF) on multimorbidity is currently unknown with limited research implying the existence of complex associations among the diverse UPF categories. Purpose The aim of the present work was to investigate the association of total and subgroup intake of UPF with cardiometabolic multimorbidity, after twenty years of observation, in a Mediterranean region. Methods In 2001-2002, n=3,042 free-of-cardiovascular disease (CVD) men and women from Attica, Greece, were recruited. Dietary assessment was based on a validated semi-quantitative food frequency questionnaire. The NOVA Food Classification system was used to assign the food products as UPF using a standard methodology. The food products assigned as UPF were further grouped as "bread and cereals", "spreads and sauces", "sweets and desserts", "artificially and sugar-sweetened beverages", "processed meat products" and "savory snacks". Cardiometabolic multimorbidity was defined as the co-occurrence of two cardiometabolic diseases i.e., type 2 diabetes and CVD within a 20-year follow-up period in a sample of n=1,846 participants with available data. Results The median consumption level of UPFs was 26.6 (16.3) servings/week contributing to around 40% of participants total daily energy intake. Over the 20–year follow–up period, n=231 cases of cardiometabolic multimorbidity were recorded. Ranking from 1st tertile (lower intake– 11.8 mean servings/week) to 2nd tertile (23.3 mean servings/week) and 3rd tertile (44.7 mean servings/week) regarding the consumption level of UPF, 20-year cardiometabolic multimorbidity was 9.5%, 13.4% and 14.7% respectively. Multi-adjusted analysis revealed that one standard deviation (SD) increase in UPF intake (servings/week) or in contribution of UPFs to total energy intake (% total energy intake) was associated with 26% [Odds ratio (OR)=1.26, 95% Confidence Interval (95%CI) (1.17–1.85)] and 29% higher risk of cardiometabolic multimorbidity [OR=1.29, 95%CI (1.08–1.69)]. Among UPF subgroups, only in case of artificial and sugar-sweetened beverages [OR=1.06, 95%CI (1.02–1.13)] as well as spreads and sauces [OR=1.06, 95%CI (1.02–1.13)] a positive association was observed. In case of breads and cereals an inverse association was observed [OR=0.95, 95%CI (0.92–0.98)]. In the rest categories even if a positive trend was observed (all ORs&amp;gt;1) significance was not reached (all p-values&amp;lt;0.05). Conclusion A dose-response relationship between UPF consumption and elevated risk of cardiometabolic multimorbidity was emerged. However, the diverse categorization of UPFs accompanied by the contradicting associations revealed herein among the different subcategories of UPFs could imply the need to return to the evaluation of foods more on the basis of their nutritional role and less on the basis of their degree of processing. The nation context accompanied by specific dietary habits should also be taken into consideration.

Mediterranean Diet, ultra-processed food consumption and semen quality in healthy young men

Abstract Background Diet quality can have beneficial effects on male reproductive health, although studies are still limited, and little is known on the potential impact of ultra-processed foods (UPFs) on semen quality parameters. Methods A cross-sectional analysis was run on 126 participants (mean age 20.0 ± 1.2 y) from the FAST randomized controlled trial in 2018-2019. Food intake was assessed through a FFQ. UPF was defined following the Nova classification and calculated as the ratio (weight ratio) between UPF (g/d) and total food (g/d). Adherence to the Mediterranean Diet (MD) was ascertained by the Mediterranean Diet Score (MDS). The semen analyses were performed using a microscope for optical evaluation with a Makler counting chamber and two automated semen analysers. The primary outcomes were sperm volume, concentration, motility and morphology. A hierarchical mixed model approach was utilized to accommodate the within-subject correlation arising from the triple temporal repetition of measurements. Results Highest UPF consumption (Q4), compared to lowest (Q1), was associated with lower sperm concentration (β=-54.1×106 spz./ml; 95%CI: -92.9 to -15.4; p-trend=0.002 across quarters), and progressive motility (β=-14.2%; 95%CI: -28.2 to -0.09; p-trend=0.036). The percentage of cells with normal morphology tended to be reduced in young men consuming more UPF compared to lowest intake (β=-2.93%; 95%CI: -6.22 to 0.37; p-trend=0.071). The MDS was not associated with any of the parameters under study. Conclusions A larger dietary share of UPF was inversely associated with sperm concentration and progressive motility in young men of reproductive age. MD adherence was not associated with semen quality parameters, and this is possibly due to the low variability of MD adherence in this sample. Dietary recommendations for improving sperm health should prioritize limiting UPF in the diet. Key messages • Ultra-processed food (UPF) intake was unfavourably associated with semen quality parameters amongst young men. • Dietary recommendations for improving sperm health should recommend limiting UPF.

Ultra-Processed Food Consumption and Its Relationship with Diet Quality Among Malaysian Young Adults

The global rise in ultra-processed food (UPF) consumption presents potential public health challenges. UPFs, laden with additives and extensively marketed, are increasingly prevalent in modern diets. However, there is limited research on UPF consumption among Malaysian young adults, particularly its relationship with diet quality. This cross-sectional study aimed to investigate the relationship between UPF consumption and diet quality among 177 young adults aged 18 to 29 years from Terengganu, Johor, and Perak. A two-day 24-hour dietary recall was used to assess UPF intake, classified by the NOVA system, while diet quality was evaluated using the Standardised-Malaysian Healthy Eating Index (S-MHEI). The S-MHEI was adopted with the scores for each food group (adequacy component) calculated according to the recommended servings per food group expressed per 1,000 kcaL. Statistical analyses, including Spearman correlation, were conducted using SPSS version 25 to determine the relationship between UPF consumption and diet quality with statistical significance set at p&lt;0.05. The median total energy intake was 1,417 kcaL (IQR=735.38), with UPFs contributing 38.6% of this intake. The median S-MHEI score was 44.65 (IQR=12.77), indicating that 74.6% of participants had poor diet quality. Statistical analysis found no significant relationship between UPF consumption and diet quality (p=0.395). Although no significant association was found, this study lays the groundwork for further research on nutrition and health among Malaysian young adults.

Higher socioeconomic status is associated with higher ultra-processed food intake: a cross-sectional analysis

Objective: To explore the differences in ultra-processed food (UPF) consumption across different socioeconomic status (SES) levels. Methods: Data on UPF consumption (grams/day) were derived from the 2017–2018 National Health and Nutrition Examination Survey. The analysis controlled for age, marital status, race, and sex. A restricted cubic spline (RCS) model was applied to examine the nonlinear response curve. Results: UPF consumption increased with higher poverty income ratio (PIR), the ratio of household income to the established poverty line. Compared to the low PIR group, the medium group showed a non-significant increase (β = 34.23[95%CI: −28.81, 97.28], p = 0.287), while the high group exhibited a significant increase (β = 115.15[95%CI: 43.53, 186.76], p = 0.002). A linear positive correlation was observed in RCS analysis (p-nonlinear = 0.166, p-overall < 0.001). Conclusions: The study highlights that higher SES is associated with greater consumption of UPF in the US. The findings suggest that policy interventions should take SES into consideration.

Ultra-processed food consumption, plasma metabolite profile, and risk of all-cause and cause-specific mortality in a population-based cohort

Epidemiological evidence on ultra-processed food (UPF) and cause-specific mortality remains limited and mixed. Molecular mechanisms underlying UPF intake and mortality remain unexplored. This study aimed to evaluate the associations between UPF consumption, metabolic signatures, and all-cause, premature, and cause-specific mortality. This study included 27670 participants (mean age 58.1 years) from the Malmö Diet and Cancer (MDC) cohort study. Consumption of UPF was assessed using a food frequency questionnaire and a 7-day food diary. In a subset of the MDC (n=879), the associations of UPF with 991 plasma metabolites were investigated. An elastic net regression model was used to establish the metabolic signature of UPF. Cox proportional hazards regression model was used to determine the association between UPF intake, metabolic signature, and mortality risk. During a median follow-up of 23.3 years, a total of 11333 participants died. UPF intake showed a nonlinear positive association with all-cause mortality, with more pronounced associations found in females (Pinteraction=0.044); in females, UPF was linked to a higher mortality risk in a linear manner, while the association was J-shaped in males. Each standard deviation (SD) increment in UPF intake was associated with an increased risk of premature mortality (HR, 1.06; 95% CI, 1.03-1.09), cardiovascular disease (CVD) mortality (HR, 1.05; 95% CI, 1.01-1.08) or respiratory disease mortality (HR, 1.08; 95% CI, 1.01-1.15), but not cancer mortality. The metabolic signature for UPF consumption (with 93 metabolites) was positively associated with all-cause mortality risk (HR per 1 SD, 1.23; 95% CI, 1.06-1.42). Our results suggest that higher UPF intake is associated with increased risk of all-cause, premature, CVD, and respiratory disease mortality, with the association varying across sex for all-cause mortality. The plasma metabolic signature of UPF showed a positive association with all-cause mortality.

Infant diet quality index predicts nutrients of concern and ultra-processed food intake in low-income children in the United States

BackgroundDiet quality during infancy can influence nutrient intake and ultra-processed foods (UPFs) consumption throughout later childhood. ObjectivesThis study investigated the predictive validity of Infant Diet Quality Index (IDQI) scores from 0 to 1 y of age and consumption of select nutrients and UPFs at different time points in low-income children aged 2–5 y. MethodsDietary surveys and 24-h dietary recalls collected between ages 0 and 12 months from 2613 Special Supplemental Women, Infants, and Children Infant Toddler Feeding Practices Study-2 participants were used to assess infant diet quality by final IDQI score ranging from 0 (nonadherence to dietary guidelines) to 1 (complete adherence to guidelines). Single 24-h recalls collected across multiple time points per child aged between 2 and 5 y were used to determine nutrient intakes: vitamin B12 (μg), vitamin D (μg), calcium (mg), iron (mg), zinc (mg), potassium (mg), saturated fat (g), dietary fiber (g), and added sugars (g). Likewise, Nova was used to classify foods (to estimate the percentage of energy from foods) by level of industrial processing at each point in time across ages 2–5 y. Survey-weighted regression analyses estimated associations between total IDQI score and nutrient intake and percentage of energy consumption from each Nova food group at each age between 2–5 y. ResultsIDQI scores based on diet quality from 0–1 y of age were positively associated with children’s dietary fiber and potassium intake at ages 2–5 y. Additionally, IDQI was negatively associated with added sugar intake. No associations were observed between IDQI and saturated fat consumption. IDQI scores at age 1 were positively associated with the percentage of energy attributed to unprocessed/minimally processed foods (20%–23%) and negatively associated with UPF consumption at ages 2–5 y (−24% to −29%). ConclusionsIDQI predicts intake of select nutrients and UPF consumption among low-income US children aged 2–5 y.This trial was registered at https://clinicaltrials.gov/study/NCT02031978 as “Feeding My Baby – A National WIC Study,” NCT02031978.

Contribution of ultra-processed food and animal-plant protein intake ratio to the environmental impact of Belgian diets

There is growing concern about the various impacts of food consumption, both on human and planetary health. Given the context-specific nature of consumption patterns, evaluating their national-level impacts is crucial for proactive policy development. This research aims to evaluate the environmental impact of current Belgian diets, with particular attention to the contribution of food groups, ultra-processed foods (UPF), and the animal-to-plant protein ratio. The methodology consists of three key stages. Firstly, the Belgian diet was summarised, based on data from the Belgian National Food Consumption Survey 2014/2015. Secondly, the origin of the most frequently consumed foods was traced using trade databases. Finally, a cradle-to-grave life cycle assessment was conducted to determine the impact of Belgian diets on climate change, water use, land use, and fossil resource scarcity. In this third step, an iterative procedure for selecting the food items to be included in the study was performed. The iterative approach resulted in the inclusion of 227 food items in the analysis. The results indicate greenhouse gas (GHG) emissions of 4.4 [4.27–4.54] kg CO2-equivalent per person per day. Red meat (35 %), beverages (16 %), dairy products (12 %) and snacks (10 %) are identified as primary contributors to climate change. Similar results were observed for land use impacts. Water use and fossil resource scarcity exhibited different trends, with beverages being the most impactful food group. Moreover, UPF account for 50 % of the total climate change and land use impacts, with a linear relationship observed between increased UPF consumption and GHG emissions and land use. A similar linear trend is observed between the ratio of animal-to-plant protein intake and both climate change and land use impact categories. A shift from the current protein ratio to a ratio of 40/60, as suggested in the Flemish Green Deal Protein Shift has been shown to result in a reduction in GHG emissions of the diet by 29 %. This study emphasises the need to target the consumption of high-impact foods such as UPF and animal-based products. Future research will investigate the relationship between environmental and health impacts.

Ultra-processed foods intake in relation to metabolic health status, serum brain-derived neurotrophic factor and adropin levels in adults

BackgroundIn recent years, there has been a lot of discussion over the impact of ultra-processed foods (UPFs) intake on overall health of subjects. However, the association between UPFs intake and metabolic unhealthy (MU) status is still in a state of ambiguity. The current study assessed the relationship between UPFs intake and MU status with regard to brain-derived neurotrophic factor (BDNF) and adropin levels.MethodsA sample of Iranian adults (aged 20–65 years) was selected to participate in this cross-sectional study using a multistage cluster random-sampling method. UPFs intake was assessed by a validated food frequency questionnaire and NOVA classification. Concentrations of metabolic parameters, BDNF and adropin were determined through fasting blood samples. MU status was assessed according to the criteria proposed by Wildman.ResultsThe overall prevalence of MU phenotype among study participants (n = 527) was 42.5%. Higher intake of UPFs was associated with elevated odds of MU status in multivariable-adjusted model (ORT3 vs. T1=1.88; 95%CI: 1.02–3.45). Moreover, a positive association was observed between UPFs intake and hypertriglyceridemia after controlling all confounders (ORT3 vs. T1=2.07; 95%CI: 1.15–3.73). However, each tertile increase in UPFs intake was not significantly associated with serum BDNF (\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$\\:\\beta\\:$$\\end{document}=0.15; 95%CI: -0.05, 0.34; P = 0.14) and adropin (\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$\\:\\beta\\:$$\\end{document}=-1.37; 95%CI: -6.16, 3.42; P = 0.58) levels in multivariable-adjusted linear regression models.ConclusionOur findings suggested that higher consumption of UPFs was related to increased likelihood of MU status among a sample of Iranian adults. Further longitudinal studies are needed to verify the directionality and generalizability of the results to all adult populations.

Ultra-processed foods and the incidence of pre-diabetes and type 2 diabetes among Iranian adults: the Tehran lipid and glucose study

BackgroundNo study has investigated the association between ultra-processed food (UPF) and pre-diabetes development. Furthermore, prior investigations on the association between UPF and the risk of type 2 diabetes (T2D) were primarily conducted in Europe and America, and studies in other regions are lacking. We investigated the association between ultra-processed foods and the risk of pre-diabetes and T2D in a cohort of Iranians.MethodsThis prospective study, with a sample size of 1954 for pre-diabetes and 2457 for T2D, was conducted among adults’ participants (aged ≥ 18 years) from the Tehran Lipid and Glucose Study (TLGS). We defined UPF intake using NOVA calcification as a proportion of total energy, and calculated its average intake during the follow-ups. The hazard ratios (HR) and 95% confidence intervals (95% CI) for pre-diabetes/T2D across tertiles of total UPF and per 10% of its increment were examined using Cox proportional hazards models. We also investigated the possibility of non-linear association using a restricted cubic spline regression.ResultsWe identified 766 and 256 cases of pre-diabetes and T2D, respectively, during a median follow-up of 7 years for pre-diabetes and 8.6 years for T2D. In the multivariable adjusted model, a 10% increase in total UPF intake was associated with a 12% higher risk of pre-diabetes (HR = 1.12; 95% 1.02, 1.23). The incidence of pre-diabetes was also higher in those in tertile 3 than those in tertile 1 (HR = 1.28; 95% CI = 1.07, 1.52). Following additional adjustment for diet quality, the results remained unchanged. Spline regression demonstrated a J-shaped association between UPF and the risk of pre-diabetes; the risk of pre-diabetes did not increase until UPF consumption exceeded about 24% of total energy intake. Of the individual UPF, hydrogenated fat/mayonnaise/ margarine group was related to an increased risk of pre-diabetes. The total UPF and its individual items were not associated with T2D.ConclusionsThis study found a positive, non-linear relationship between total UPF and the risk of pre-diabetes in Iranian adults. Our data could not show any significant association between UPF and T2D risk.