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Multilevel barriers to clinical and nutritional research in Latin America: a socioeconomic comparative analysis
(Frontiers Media SA, 2025-12-31)
Evelyn Frias-Toral
;
Jaime Angamarca-Iguago
;
Isabel Calvo Higuera
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Jorge Carriel-Mancilla
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Guillermo Contreras
Clinical and nutritional research in Latin America faces significant challenges that limit scientific development and evidence-based healthcare. Understanding these barriers is essential for developing effective strategies to enhance research capacity in the region. This study aimed to identify multilevel barriers to clinical and nutritional research in Latin America and compare them between countries of different socioeconomic levels. Methods A cross-sectional study was conducted with 327 healthcare professionals involved in clinical and nutritional research across Latin America. Data collection occurred via an online survey in which participants rated the importance of 16 potential barriers on a 3-point Likert scale. Analysis included descriptive statistics, chi-square tests to compare barriers between upper-middle and lower-middle-income countries, logistic regression to identify predictors of research participation, and k-means cluster analysis to identify researcher profiles. Results Funding (84.4%), research materials (71.6%), and time constraints (70.9%) emerged as the most significant barriers across all countries. Three barriers showed statistically significant differences between income levels: participant commitment (73.6% vs. 42.6%, &lt; 0.001), frequent appointments (56.6% vs. 37.8%, = 0.02), and language barriers (39.6% vs. 22.9%, = 0.02), all of which were higher in lower-middle-income countries. Logistic regression identified the importance of research materials (OR = 0.36, = 0.002) and telemedicine (OR = 1.74,  = 0.044) as significant predictors of research participation. Cluster analysis revealed three distinct researcher profiles based on barrier perception patterns. Conclusion Multilevel barriers to research in Latin America are dominated by universal resource constraints (funding, materials, time), with lower-middle-income countries facing additional challenges in participant engagement and study logistics. The relative homogeneity of most barriers across income groups suggests that regional and institutional factors may be more influential than national income levels. These findings provide a foundation for developing targeted strategies to strengthen research capacity and infrastructure across Latin America.
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Actual macronutrient composition of the Mediterranean diet and its association with adiposity and inflammation: a cross-sectional real-life study
(Springer Science and Business Media LLC, 2025-11-11)
Claudia Vetrani
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Evelyn Frias-Toral
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Annamaria Di Martino
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Federica Cantelli
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Chiara Graziadio
Background and objectives The Mediterranean diet (MD) relies on a specific food consumption pattern that has been given pleiotropic effects on human health. However, even foods typically considered beneficial within the MD framework may vary in macronutrient composition, potentially leading to imbalanced or unhealthy dietary profiles despite overall adherence. To date, no study has evaluated the total energy intake and percentage macronutrient composition in a cohort of adult individuals stratified by their adherence to MD. We aimed to investigate the total energy intake and macronutrient composition among individuals stratified by adherence to MD, and its association with indices of adiposity and inflammation. Methods A cross-sectional study was conducted in 1342 volunteers. Participants underwent clinical examination (anthropometry, body composition, and high-sensitivity C-reactive protein assessment), and nutritional data collection, including adherence to MD (PREDIMED questionnaire) and habitual diet composition (7-day food records). The associations between PREDIMED score, macronutrient composition, and clinical outcomes were explored by Pearson’s correlation. Linear regression analysis was used to assess the macronutrient that best predicted adherence to MD. Results Participants with high adherence to MD (H-MD) presented lower intake of carbohydrate, while higher protein and fat amounts than individuals with medium (M-HD) or low (L-MD) adherence to MD. The H-MD group showed lower adiposity (body mass index, waist circumference, and fat mass) and C-reactive protein concentrations than individuals in the M-MD and L-MD groups p < 0.001 for all comparisons). Linear regression analysis showed low carbohydrate intake as the best predictor of high PREDIMED score (β: -0.875; p < 0.001). Conclusion H-MD is characterised by lower carbohydrate, higher protein and fat intakes than those usually reported in nutritional recommendations. This profile was significantly associated with lower adiposity and inflammation. A low carbohydrate amount was the best predictor of H-MD, suggesting that dietary carbohydrate should be on the lower side of the recommended range.
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Navigating the weight: The impact of obesity on gastrointestinal cancer surgery and strategies for improved outcomes
(Elsevier BV, 2025-09-01)
Gerardo Sarno
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Claudia Reytor-González
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Evelyn Frias-Toral
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Martín Campuzano-Donoso
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Christos S. Katsanos
Obesity significantly affects gastrointestinal cancer surgery outcomes by creating complex challenges throughout the preoperative, intraoperative, and postoperative stages. This narrative review explores the intricate relationship between obesity and GIC surgery, highlighting the dual burden of obesity as a global public health issue and a determinant of surgical complications. The review aims to analyze physiological and technical hurdles, including limited visibility, prolonged operative times, increased perioperative risks, and adverse recovery outcomes associated with obesity. Evidence emphasizes the critical role of excess visceral fat, systemic inflammation, and insulin resistance in elevating surgical risks. Mitigation strategies involve preoperative nutritional optimization, use of advanced surgical technologies such as robotic-assisted and laparoscopic systems, and individualized postoperative care, encompassing early mobilization, tailored pain management, and close monitoring of metabolic parameters. Despite advancements, knowledge gaps remain, particularly regarding sarcopenic obesity and the long-term impact of preoperative dietary interventions. Future research should focus on refining minimally invasive techniques, integrating personalized medicine, and exploring innovative perioperative protocols to address obesity-related risks effectively. By fostering a multidisciplinary approach, this review underscores the necessity for targeted interventions to enhance outcomes and improve the quality of care for patients with obesity undergoing gastrointestinal cancer surgery.
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Timing matters: lipid intake and its influence on menopausal-related symptoms
(Springer Science and Business Media LLC, 2025-08-18)
Ludovica Verde
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Luigi Barrea
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Evelyn Frias-Toral
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Raynier Zambrano-Villacres
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SIMANCAS RACINES, DANIEL ALEJANDRO
Background Menopause contributes to central obesity and increases cardiovascular risk in women. Diet influences both menopausal symptoms and cardiovascular health, but the impact of chrononutrition, namely food timing, is not well understood. This cross-sectional study investigated whether the timing of food intake affected menopausal symptoms in 100 postmenopausal women with overweight or obesity. Methods Anthropometric and clinical parameters, and lifestyle habits were assessed. Menopausal symptoms were evaluated using the Menopause Rating Scale (MRS). Nutritional assessment utilized 7-day food records. Food intake was divided into morning intake (meals from breakfast to lunch) and evening intake (meals from afternoon snacks to dinner). Results The mean MRS score was 22.7 ± 7.8, showing a high prevalence of symptoms in the study population. Postmenopausal women under the median of morning energy intake showed a significantly a higher score for heart discomfort (p = 0.045), while those under the median of morning intake of lipids showed significantly higher scores for heart discomfort and lower scores for bladder problems (p = 0.013 and p = 0.040, respectively). Postmenopausal women above the median evening intake of lipids showed a significantly higher score for heart discomfort (p = 0.007). The heart discomfort score correlated negatively and positively with the morning (r = -0.210, p = 0.034) and evening (r = 0.210, p = 0.034) intakes of lipids, respectively, even after correction for confounding factors (r = -0.219 and r = 0.219, p = 0.028 for both). Conclusion Consuming most of the energy and lipids later in the day was linked to higher prevalence of menopausal symptoms in postmenopausal women with overweight or obesity. This eating pattern may potentially have adverse effects on the cardiovascular health of these women. Therefore, adopting chrononutrition behaviors, particularly favoring an earlier intake of energy and lipids, could prove beneficial as an additional measure in the nutritional therapy for postmenopausal women dealing with overweight or obesity.
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Beyond dietary therapy: addressing weight stigma awareness in medical students
(Springer Science and Business Media LLC, 2025-08-22)
Giuseppe Annunziata
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Giordano Bruno Zonzini
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Evelyn Frias-Toral
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Raynier Zambrano-Villacres
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Alexander Bertuccioli
Background The growing prevalence of obesity worldwide has drawn increased attention to the issue of weight stigma. Discriminatory attitudes related to body weight are evident across various settings, including those that should ideally offer support to individuals with obesity, such as schools and sports facilities. This research aimed to examine weight-related stigma among university students enrolled in healthcare-related academic programs. Methods To measure weight stigma, researchers administered the Italian version of the Attitude Toward Obese Persons (I-ATOP) questionnaire to 201 students from the University of Urbino (Italy) and the University of Malaga (Spain). The analysis explored variations in stigma levels based on gender, BMI classification, nationality, Italian regional location, level of academic education, medical history, and lifestyle factors. Results The participant pool was predominantly female (58.2%) and Spanish (66.7%), with an average age of 22.86 ± 3.08 years and a mean BMI of 22.80 ± 3.25 kg/m, placing most respondents in the normal weight range. Nearly half (47.8%) demonstrated a low degree of stigmatising attitudes. Within the sample, significantly lower stigma levels were reported among female and Spanish students (> = 0.001 and > = 0.011, respectively), as well as among those without a history of eating disorders (> = 0.017) and those who engaged in physical activity (> = 0.029). Additionally, stigma showed a notable decline in relation to higher educational attainment ConclusionThis pilot study reveals the presence of weight stigma even within healthcare education settings, where future health professionals are being trained. These findings underscore the urgent need for comprehensive educational strategies aimed at fostering inclusive and nonjudgmental attitudes toward individuals with obesity. Importantly, the assessment and management of weight stigma should extend beyond nutritional therapy alone, recognizing its psychological, social, and structural dimensions. Integrating this broader perspective into healthcare curricula is thus essential to improve the quality of care for individuals living with one of the most prevalent and complex chronic conditions.
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Expert Consensus on the Nutrition Care Process in Guatemalan Hospitals: Findings from a Delphi Study of nutritionDay 2022 Participants
(MDPI AG, 2025-09-30)
Karen Girón
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Isabel Chinchilla
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Christa Gómez
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Marietta Lau
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María René Oroxon
Background: Disease-related malnutrition (DRM) remains an underdiagnosed condition in Latin American hospitals, with substantial clinical and economic consequences. The global nutritionDay initiative, promoted by ESPEN, provides a standardized audit to evaluate and improve hospital nutritional care. This study aimed to develop expert consensus recommendations to optimize the nutritional care process in Guatemalan hospitals, based on the findings from nutritionDay 2022. Methods: A modified Delphi study was conducted, including three meetings held before and after each round to discuss the results. Sixteen clinical nutrition professionals from eleven hospitals participated. A total of 89 items were assessed, with a predefined consensus threshold of 70%. Data were analyzed using R software (version 4.5.0) and Kendall’s W coefficient was applied to evaluate inter-round agreement. Results: Consensus was achieved for 51 key recommendations covering nutritional screening, clinical assessment, anthropometry, body composition, functional assessment, biochemical monitoring, dietary intervention, and post-discharge follow-up. The proposed actions are aligned with international guidelines (ESPEN, ASPEN, GLIM) and adapted to the Guatemalan healthcare context. Conclusions: This consensus provides a comprehensive and context-specific framework for standardizing and improving hospital nutritional care in Guatemala and similar settings. Its implementation could help reduce DRM prevalence and foster the development of quality indicators and digital tools for clinical nutrition management.
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Differential impact of coffee quantity and sweetening on body composition parameters and inflammation
(Frontiers Media SA, 2025-09-17)
Giuseppe Annunziata
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Evelyn Frias-Toral
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Francesco Campa
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Maria Antonieta Touriz Bonifaz
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Ludovica Verde
Background: Coffee is the most consumed and popular beverage worldwide. The health benefits of its regular, moderate consumption are well known, and include antioxidant and anti-inflammatory effects, as well as metabolic effects, reducing the risk of obesity and related diseases. The available literature, however, provides no information about the effect of coffee consumption on body composition (BC) and inflammation. The present cross-sectional observational study aims to investigate the effect of coffee consumption on BC and inflammation-related parameters, as well as the possible impact of adding sugar and the frequency of consumption. Coffee consumption habits, preference for adding sugar and frequency of daily consumption were assessed in 2,556 adults (1,080 men and 1,476 women). BC was assessed using Bioelectrical Impedance Analysis (BIA), whilst high-sensitivity C-reactive protein (hs-CRP) levels were monitored for inflammatory status. Results: A total of 1,855 subjects (680 men and 1,175 women) were included in the statistical analysis. Compared to non-consumers, coffee consumers showed lower body mass index (BMI), waist girth (WG), and hs-CRP levels, and higher skeletal muscle mass (SMM), appendicular SMM (ASMM), phase angle (PhA), and standardised PhA (SPA) (p< 0.001 for all). The same trend was observed for unsweetened coffee consumers compared to subjects consuming sweetened coffee. With increasing coffee consumption, BMI, WG, and hs-CRP generally decreased, whilst SMM and ASMM showed a bell-shaped trend with peak values in those consuming 2–3 cups per day. Similarly, PhA and SPA values were highest among moderate coffee consumers. Conclusion: These findings suggest that moderate coffee consumption, particularly unsweetened coffee, is associated with more favourable body composition and inflammatory profiles. Given the observational design, causality cannot be established. Nevertheless, the results may inform dietary guidance aimed at supporting muscle maintenance and mitigating obesity-related metabolic risk.
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Effects of Preoperative Exercise Interventions in Patients Undergoing Metabolic and Bariatric Surgery: A Systematic Review and Meta-Analysis
(MDPI AG, 2025-09-01)
SIMANCAS RACINES, DANIEL ALEJANDRO
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PARISE VASCO, JUAN MARCOS
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ANGAMARCA IGUAGO, JAIME WLADIMIR
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Ashley Carolina Cuzco Macias
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Carlos Soria
Background: Obesity affects over one billion people globally. Bariatric surgery is the most effective long-term intervention for severe obesity. However, postoperative outcomes can vary considerably, with such factors as baseline fitness and cardiorespiratory reserve influencing surgical outcomes. This systematic review aimed to evaluate the effects of preoperative exercise or physical activity, compared to standard care or no intervention, on preoperative fitness parameters and perioperative surgical outcomes in adults with obesity undergoing metabolic and bariatric surgery. Methods: A systematic review was conducted in accordance with the recommendations of the Cochrane Handbook and the PRISMA guidelines. Randomized controlled trials, non-randomized controlled trials, and cohort studies with control groups evaluating preoperative exercise interventions were included. Two independent reviewers conducted study selection, data extraction, and risk of bias assessment using Cochrane tools. Meta-analyses were performed using random effects models, with standardized mean differences calculated for continuous outcomes. Evidence certainty was assessed using the GRADE approach. Results: A total of 15 studies, including 1378 participants, were identified for qualitative synthesis, with 12 contributing data for quantitative meta-analysis. Preoperative exercise interventions significantly improved six-minute walk test distance (SMD 2.01; 95% CI: 0.51 to 3.50; p = 0.009) and VO2 peak (SMD 1.02; 95% CI: 0.52 to 1.51; p < 0.0001). BMI reduction was significant (SMD −0.96; 95% CI: −1.75 to −0.16; p = 0.02), while weight change was not statistically significant (SMD −0.81; 95% CI: −1.72 to 0.09; p = 0.08). One study reported a reduction in hospital length of stay of 0.64 days (95% CI: −0.86 to −0.42; p < 0.00001). Evidence certainty was rated as very low to low across all outcomes. Conclusions: Preoperative exercise interventions have been shown to significantly improve cardiorespiratory fitness in bariatric surgery candidates, with large effect sizes for functional capacity measures. Despite the low certainty of the evidence, these findings suggest that supervised exercise programs should be incorporated into the preoperative care of bariatric surgery patients.
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Chrononutrition and Energy Balance: How Meal Timing and Circadian Rhythms Shape Weight Regulation and Metabolic Health
(MDPI AG, 2025-06-27)
Claudia Reytor-González
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SIMANCAS RACINES, DANIEL ALEJANDRO
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Náthaly Mercedes Román-Galeano
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Giuseppe Annunziata
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Martina Galasso
Obesity and metabolic disorders remain major global health concerns, traditionally attributed to excessive caloric intake and poor diet quality. Recent studies emphasize that the timing of meals plays a crucial role in determining metabolic health. This review explores chrononutrition, a growing field that examines how food intake patterns interact with endogenous circadian rhythms to influence energy balance, glucose and lipid metabolism, and cardiometabolic risk. The circadian system, which includes a central clock in the suprachiasmatic nucleus and peripheral clocks in metabolic tissues, regulates physiological functions on a 24 h cycle. While light entrains the central clock, feeding schedules act as key synchronizers for peripheral clocks. Disrupting this alignment—common in modern lifestyles involving shift work or late-night eating—can impair hormonal rhythms, reduce insulin sensitivity, and promote adiposity. Evidence from clinical and preclinical studies suggests that early time-restricted eating, where food intake is confined to the morning or early afternoon, offers significant benefits for weight control, glycemic regulation, lipid profiles, and mitochondrial efficiency, even in the absence of caloric restriction. These effects are particularly relevant for populations vulnerable to circadian disruption, such as adolescents, older adults, and night-shift workers. In conclusion, aligning food intake with circadian biology represents a promising, low-cost, and modifiable strategy to improve metabolic outcomes. Integrating chrononutrition into clinical and public health strategies may enhance dietary adherence and treatment efficacy. Future large-scale studies are needed to define optimal eating windows, assess long-term sustainability, and establish population-specific chrononutritional guidelines.
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Spatial analysis of receptivity and vulnerability to arbovirosis transmission in Ecuador between 2015 and 2019: An ecological study
(Medwave Estudios Limitada, 2025-04-03)
Jaen Cagua-Ordoñez
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Inti Quevedo-Bastidas
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SIMANCAS RACINES, DANIEL ALEJANDRO
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Evelyn Frias-Toral
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PARISE VASCO, JUAN MARCOS
Introduction Arboviruses such as dengue, Zika and chikungunya represent a threat to public health in several South American countries, including Ecuador. Accurate identification of local risk areas and detection of critical transmission points are crucial for the effective planning of vector control programs, particularly in the management of the effectively planning vector control programs, particularly in managing mosquito. This study aimed to characterize the variables of receptivity and vulnerability to arboviral transmission at the cantonal level, and to identify hotspots in Ecuador between 2015 and 2019. Methods Environmental and sociodemographic data at the cantonal level were used to perform a spatial analysis, which included a spatial autocorrelation analysis to identify transmission hotspots at the parish level. GeoDa software was used to detect these hotspots. Results The provinces of Ecuador with the highest levels of receptivity and vulnerability were Manabí, Guayas, El Oro and Esmeraldas. These levels were mainly related to temperature, altitude, and limited access to clean water services. Fifty-six cantons were identified as high transmission areas. Nine parishes were classified as transmission hotspots for five consecutive years. Conclusions The spatial analysis allowed for precisely identifying the more susceptible and vulnerable areas for arbovirus transmission in Ecuador. The persistence of transmission hotspots in certain municipalities was evidenced, influenced by environmental and sociodemographic factors. This evidence is key to adapt and improve vector surveillance and control strategies in the most affected regions.

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