Looking to the future: Agendas, directions, and resources for nutrition research.

The development and progression of nutrition as a scientific field is ever evolving and complex. Although the history of nutrition research began by exploring specific food components, it has evolved to encompass a more holistic view that considers the impact of dietary patterns over time, interactions with the environment, nutrition's role in disease processes, and public policy related to nutrition health. To guide the future direction of nutrition science, both federal and other professional organizations have established agendas and goals. The Strategic Plan for National Institutes of Health Nutrition Research outlines four goals and five cross-cutting research areas that are priorities to explore between 2020 and 2030. Similarly, the American Society for Parenteral and Enteral Nutrition and other governmental and professional organizations have identified priority areas in their research agendas. Rigorous research studies are needed to explore these areas of interest while also considering practical implementation strategies for translating research into practice. Nutrition clinicians are uniquely positioned to lend expertise in the areas of research design, implementation, advocacy and evidence-based practice; there are numerous resources to support practitioners in these endeavors.

Advances in Medical Nutrition Therapy: Parenteral Nutrition.

Parenteral nutrition has evolved tremendously, with parenteral formulas now safer and more accessible than ever. "All-in-one" admixtures are now available, which simplify parenteral nutrition usage and decrease line infection rates alongside other methods of infectious control. Recently published data on the benefits of parenteral nutrition versus enteral nutrition together with the widespread use of indirect calorimetry solve many safety issues that have emerged over the years. All these advances, alongside a better understanding of glycemic control and lipid and protein formulation improvements, make parenteral nutrition a safe alternative to enteral nutrition.

Setting research priorities on multiple micronutrient supplementation in pregnancy.

Prenatal micronutrient deficiencies are associated with negative maternal and birth outcomes. Multiple micronutrient supplementation (MMS) during pregnancy is a cost-effective intervention to reduce these adverse outcomes. However, important knowledge gaps remain in the implementation of MMS interventions. The Child Health and Nutrition Research Initiative (CHNRI) methodology was applied to inform the direction of research and investments needed to support the implementation of MMS interventions for pregnant women in low- and middle-income countries (LMIC). Following CHNRI methodology guidelines, a group of international experts in nutrition and maternal health provided and ranked the research questions that most urgently need to be resolved for prenatal MMS interventions to be successfully implemented. Seventy-three research questions were received, analyzed, and reorganized, resulting in 35 consolidated research questions. These were scored against four criteria, yielding a priority ranking where the top 10 research options focused on strategies to increase antenatal care attendance and MMS adherence, methods needed to identify populations more likely to benefit from MMS interventions and some discovery issues (e.g., potential benefit of extending MMS through lactation). This exercise prioritized 35 discrete research questions that merit serious consideration for the potential of MMS during pregnancy to be optimized in LMIC.

Toward the Definition of Personalized Nutrition: A Proposal by The American Nutrition Association.

Personalized nutrition holds tremendous potential to improve human health. Despite exponential growth, the field has yet to be clearly delineated and a consensus definition of the term "personalized nutrition" (PN) has not been developed. Defining and delineating the field will foster standardization and scalability in research, data, training, products, services, and clinical practice; and assist in driving favorable policy. Building on the seminal work of pioneering thought leaders across disciplines, we propose that personalized nutrition be defined as: a field that leverages human individuality to drive nutrition strategies that prevent, manage, and treat disease and optimize health, and be delineated by three synergistic elements: PN science and data, PN professional education and training, and PN guidance and therapeutics. Herein we describe the application of PN in these areas and discuss challenges and solutions that the field faces as it evolves. This and future work will contribute to the continued refinement and growth of the field of PN.Teaching pointsPN approaches can be most effective when there is consensus regarding its definition and applications.PN can be delineated into three main areas of application: PN science and data, PN education and training, PN guidance and therapeutics.PN science and data foster understanding about the impact of genetic, phenotypic, biochemical and nutritional inputs on an individual's health.PN education and training equip a variety of healthcare professionals to apply PN strategies in many healthcare settings.PN professionals have greater ability to tailor interventions via PN guidance and therapeutics.Favorable policy allows PN to be more fully integrated into the healthcare system.

Nutritional Psychiatry: From Concept to the Clinic.

The field of 'nutritional psychiatry' has evolved with rapidity over the past several years, with an increasing amount of dietary or nutrient-based (nutraceutical) intervention studies being initiated, and more preclinical and epidemiological data being available. This emergent paradigm involves the clinical consideration (where appropriate) of prescriptive dietary modification/improvement, and/or the select judicious use of nutrient-based supplementation to prevent or manage psychiatric disorders. In the last several years, significant links have increasingly been established between dietary quality and mental health (although not all data are supportive). Maternal and early-life nutrition may also affect the mental health outcomes in offspring. In respect to nutraceutical research, like with many recent conventional drug studies, results are fairly mixed across the board, and in many cases there is not emphatic evidence to support the use of nutraceuticals in various psychiatric disorders. This may in part be due to a preponderance of recent studies within the field revealing marked placebo effects. Due to current indicators pointing towards mental disorders having an increasing burden of disease, bold and innovative approaches on a societal level are now required. In light of the widespread use of nutrient supplements by those with and without mental disorders, it is also critical that scientifically rigorous methodologies be brought to bear on the assessment of the efficacy of these supplements, and to determine if, or what dose of, a nutrient supplement is required, for whom, and when, and under what circumstances. More simple studies of additional isolated nutrients are not of great benefit to the field (unless studied in supra-dosage in an individualised, biomarker-guided manner), nor, based on recent data, is the research of 'shotgun' formulations of nutraceuticals. The next critical step for the field is to design psychiatric interventional studies for both dietary modification and nutraceuticals, based on more of a personalised medicine approach, using biomarkers (e.g. nutrient deficiencies, inflammatory cytokine levels, genomic assessment, microbiome analysis) and a person's dietary patterns and individual macro/micronutrient requirements.

ω-6 Polyunsaturated Fatty Acids and Cardiometabolic Health: Current Evidence, Controversies, and Research Gaps.

The 2015 Dietary Guidelines for Americans recommend limiting the intake of saturated fatty acids (SFAs) to <10% of energy/d and replacing dietary SFAs with unsaturated fatty acids. A Presidential Advisory from the American Heart Association recently released its evaluation of the relation between dietary fats and cardiovascular disease (CVD), and also recommended a shift from SFAs to unsaturated fatty acids, especially polyunsaturated fatty acids (PUFAs), in conjunction with a healthy dietary pattern. However, the suggestion to increase the intake of PUFAs in general, and omega-6 (n-6) PUFAs in particular, continues to be controversial. This review was undertaken to provide an overview of the evidence and controversies regarding the effects of ω-6 PUFAs on cardiometabolic health, with emphasis on risks and risk factors for CVD (coronary heart disease and stroke) and type 2 diabetes mellitus (T2D). Results from observational studies show that higher intake of ω-6 PUFAs, when compared with SFAs or carbohydrate, is associated with lower risks for CVD events (10-30%), CVD and total mortality (10-40%), and T2D (20-50%). Findings from intervention studies on cardiometabolic risk factors suggest that ω-6 PUFAs reduce concentrations of LDL cholesterol and non-HDL cholesterol in a dose-dependent manner compared with dietary carbohydrate, and have a neutral effect on blood pressure. Despite the concern that ω-6 fatty acids increase inflammation, current evidence from studies in humans does not support this view. In conclusion, these findings support current recommendations to emphasize consumption of ω-6 PUFAs as a replacement of SFAs; additional randomized controlled trials with cardiometabolic disease outcomes will help to more clearly define the benefits and risks of this policy.

Perspective: Reductionist Nutrition Research Has Meaning Only within the Framework of Holistic and Ethical Thinking.

Today, it seems that nutrition is in a state of great confusion, especially for the general public. For decades, some nutrients (e.g., cholesterol, saturated fats, sugars, gluten, salt) and food groups (e.g., dairy, cereals, meats) have been regularly denigrated. In this position paper, we hypothesize that such a state of confusion is mainly the result of the reductionist paradigm applied to nutrition research for more than a century, and by being pushed to its extreme, this perspective has led to accusations about some nutrients and foods. However, the real issue is about foods taken as a whole and therefore about their degree of processing, which affects both the food matrix and composition. Indeed, we eat whole foods, not nutrients. Therefore, the objectives of this article are to emphasize the need for more holistic approaches in nutrition to preserve our health, animal welfare, and planet. We propose to first redefine the food health potential on a holistic basis and then to show that reductionism and holism are interconnected approaches that should coexist. Then, we try to explain how extreme reductionism has been disconnected from reality and ethical considerations and has ultimately led to environmental degradation and loss of biodiversity, notably through very specific crops, and to an increased prevalence of chronic diseases. Furthermore, to address the confusion of the general public and to simplify nutritional messages, we propose 3 holistic golden rules based on scientific evidence to protect human health, animal welfare, and the environment (climate and biodiversity). Finally, we try to show how these 3 rules can be easily applied worldwide while respecting the environment, cultural traditions, and heritage.

[Current challenges of nutrition applied research: ¿person or population?] / Retos actuales de la investigación en nutrición aplicada: ¿persona o población?

During the last half of the 20th century, Nutrition has evolved in a quick way based on the knowledge of both basic sciences as Biochemistry and Physiology and applied sciences as Epidemiology and Public Health. In that period the nutritional requirements for different population groups grouped by sex, age and physiological conditions have been established. However, in spite of the enormous knowledge in food and nutritional sciences, malnutrition by nutrient deficiencies (protein-energy undernutrition and micronutrient deficiencies) and by excess of nutrient intake (overweight and obesity) continues being a critical burden and challenge for numerous countries. In September 2015, the General Assembly of the United Nations established the "Sustainable Development Goals" with the aim of "to warrant a healthy life and promote the welfare for all in all ages", and defined a number of targets to reach maternal, infant and childhood nutrition, as well as to prevent non-communicable chronic diseases. Even though there are food intake guidelines and general recommendations for population nutrient intakes, individuals respond differently to lifestyle interventions depending on their genetic variants, which in turn influence the absorption and metabolism of nutrients. Indeed, the response of an individual to food intake and nutrients is the result of the interaction of a number of metabolic, genetic, environmental and social factors. Nutritional genomics is the science trying to facilitate an explanation at molecular levels of how nutrients and other bioactive food components interact with the genes of an individual and their effects on health. The new "omics" science tools (genomics, epigenomics, transcriptomics, proteomics and metabolomics) applied to nutrition is currently allowing the development of nutritional genomics. While "personalized nutrition" refers to the adaptation of the diet to individual needs and preferences, "precision nutrition" predicts whether an individual is responding or not to specific nutrients and food and dietary patterns in such a way they can contribute to the prevention of disease based on the genetic information and phenotype of that particular individual. One of the biggest challenges of nutrition today is to make possible precision nutrition in order to contribute to the improvement of the population and decrease the burden of non-communicable chronic diseases.

Durante la segunda mitad del siglo xx la nutrición se ha desarrollado de forma acelerada, basada en los conocimientos de ciencias básicas, como la bioquímica y la fisiología, y de ciencias aplicadas, como la epidemiología y la salud pública. En ese periodo se han establecido recomendaciones de nutrientes para determinados segmentos de población según su sexo, edad y condición fisiológica. No obstante, a pesar de los conocimientos generados, la desnutrición, tanto por defecto (deficiencia proteico-energética y de micronutrientes) como por exceso (sobrepeso y obesidad), representa una lacra para numerosos países. En septiembre de 2015, la Asamblea General de las Naciones Unidas estableció los denominados Objetivos de Desarrollo Sostenible (ODS) con el fin de "garantizar una vida sana y promover el bienestar para todos en todas las edades", y se determinaron una serie de metas específicas para la nutrición materna, la de los lactantes y la de los niños de corta edad, así como para la prevención y control de las enfermedades crónicas no transmisibles. A pesar de que existen recomendaciones de ingesta de nutrientes a nivel poblacional, los individuos responden de forma diferente a las intervenciones en los estilos de vida a causa de que sus variantes génicas influyen en la absorción y utilización metabólica de los nutrientes. Es decir, la respuesta de un individuo a la ingesta de alimentos (y, por lo tanto, de los nutrientes) resulta de la interacción de factores metabólicos, genéticos, ambientales y sociales. La genómica nutricional es la ciencia que trata de facilitar una explicación a nivel molecular de cómo los nutrientes y otros componentes de los alimentos interaccionan con el conjunto de genes de un individuo y su repercusión sobre el estado de salud. Las herramientas de las ciencias ómicas (genómica, epigenómica, transcriptómica, proteómica y metabolómica) aplicadas a la nutrición posibilitan el desarrollo de la genómica nutricional. Mientras que el concepto de "nutrición personalizada" se refiere a la adaptación de la dieta a las necesidades y referencias individuales, la "nutrición de precisión" predice si un individuo concreto va a responder a determinados nutrientes y patrones dietéticos, de forma que la utilización de la información genética y fenotípica del individuo puede contribuir a la prevención de la enfermedad. Uno de los mayores retos de la nutrición es posibilitar una nutrición de precisión basada en el conocimiento para contribuir así a mejorar la salud de la población y disminuir la incidencia de enfermedades crónicas.

Aquacultural, Nutritional and Therapeutic Biology of Delicious Seeds of Euryale ferox Salisb. : A Minireview.

BACKGROUND: Euryale ferox Salisb. (Makhana) is a rooted macro-hydrophyte, grown as a crop in north Bihar wetlands, India. Makhana refers to yummy pops prepared through mechanical smacking of the baked seeds of E. ferox. New techniques have been evolved to produce pops from seeds at a brisk pace. OBJECTIVE: It is specially associated with marital rituals possibly in view of its spermatogenic properties. It has a high amino acid index but a low glycemic value. The plant carries medicinal values against cardiovascular and diabetes-related diseases. Makhana pops with a high volume to mass ratio, is developed as a reliable system for drug delivery in the recent times. RESULTS: There is a fair prospect of raising multi-faceted industry based on Makhana culture, harvest, post-harvest safety, preparation of pops and various types of food products therefrom and marketing in areas where water-logging is considered as a curse. It may generate employment and strengthen regional economy propping check on population migration primarily due to non-employment and poverty. CONCLUSION: Active research is required to harness this macro-hydrophyte along with co-culture of compatible fish varieties and other hydrophytes into a sustainable livelihood and economic prosperity.

Alimentación y nutrición en atención primaria en Brasil / Food and nutrition in primary care in Brazil

Objetivo: Describir las acciones sobre alimentación y nutrición que han sido publicadas en la literatura científica en el ámbito de la atención primaria en salud en Brasil. Método: Revisión exploratoria de los estudios publicados entre los años 2007 y 2016. Se consultaron las bases de datos Lilacs, PubMed, Scopus y Web of Science. Resultados: Se incluyeron 103 artículos, la mayoría publicados entre los años 2012 y 2016, predominantemente en la región sudeste de Brasil. Los temas más frecuentes fueron hábito o consumo alimenticio, estado nutricional y enfermedades crónicas no transmisibles. La mayoría de las acciones fueron propuestas por universidades, principalmente con fines diagnósticos. Fueron encontradas pocas acciones de promoción de la salud, alimentación saludable, asistencia y tratamiento, cuidado integral y prevención de enfermedades relacionadas con la alimentación y la nutrición. Conclusiones: Hubo crecimiento en el interés nacional sobre el tema. Sin embargo, la producción académica todavía se encuentra distante de las necesidades reales de generación de evidencia que impacten positivamente sobre la situación de salud. Se identificó la necesidad de realizar más investigaciones para describir, proponer y evaluar las acciones y los programas ya desarrollados. Resulta fundamental una mayor aproximación entre las universidades, la gestión y los servicios para definir intereses comunes y generar investigaciones que respondan a las necesidades del área, y de esta manera contribuir en la planificación y el perfeccionamiento de las acciones y de los programas ya existentes

Objective: To describe food and nutrition actions in primary health care in Brazil. Methods: Exploratory review of articles published between 2007 and 2016. Lilacs, PubMed, Scopus and Web of Science databases were consulted. Results: 103 articles were included, mostly published between 2012 and 2016 and developed mainly in the Southeast region of Brazil. The most prevalent research topics were food behaviour or consumption, nutritional status and non-communicable diseases. Most research was led by universities and was focused on diagnosis. Few actions on health promotion, healthy eating, assistance, treatment, integral health care and prevention of diseases related to food and nutrition were found in the review. Conclusion: National interest in food and nutrition has increased, however academic production is still far from the actual needs for providing evidence that impacts health status. More research is needed to describe, propose and evaluate programmes and actions. Therefore, it is essential for closer relationships to be forged between universities, managers and health services in order to identify common interests and to develop research that meets the needs of the area and contribute to planning and improving programmes and actions

21st century toolkit for optimizing population health through precision nutrition.

Scientific, technological, and economic progress over the last 100 years all but eradicated problems of widespread food shortage and nutrient deficiency in developed nations. But now society is faced with a new set of nutrition problems related to energy imbalance and metabolic disease, which require new kinds of solutions. Recent developments in the area of new analytical tools enable us to systematically study large quantities of detailed and multidimensional metabolic and health data, providing the opportunity to address current nutrition problems through an approach called Precision Nutrition. This approach integrates different kinds of "big data" to expand our understanding of the complexity and diversity of human metabolism in response to diet. With these tools, we can more fully elucidate each individual's unique phenotype, or the current state of health, as determined by the interactions among biology, environment, and behavior. The tools of precision nutrition include genomics, metabolomics, microbiomics, phenotyping, high-throughput analytical chemistry techniques, longitudinal tracking with body sensors, informatics, data science, and sophisticated educational and behavioral interventions. These tools are enabling the development of more personalized and predictive dietary guidance and interventions that have the potential to transform how the public makes food choices and greatly improve population health.

The future for long chain n-3 PUFA in the prevention of coronary heart disease: do we need to target non-fish-eaters?

Dietary guidelines in many countries include a recommendation to consume oily fish, mainly on the basis of evidence from prospective cohort studies that fish consumption is cardioprotective. However, average intakes are very low in a large proportion of the UK population. Some groups, such as vegans and vegetarians, purposely omit fish (along with meat) from their diet resulting in zero or trace intakes of long chain (LC) n-3 PUFA. Although the efficacy of dietary fish oil supplementation in the prevention of CVD has been questioned in recent years, the balance of evidence indicates that LC n-3 PUFA exert systemic pleiotropic effects through their influence on gene expression, cell signalling, membrane fluidity and by conversion to specialised proresolving mediators; autacoid lipid mediators that resolve inflammatory events. The long-term impact of reduced tissue LC n-3 PUFA content on cardiovascular health is surprisingly poorly understood, particularly with regard to how low proportions of LC n-3 PUFA in cell membranes may affect cardiac electrophysiology and chronic inflammation. Randomised controlled trials investigating effects of supplementation on prevention of CHD in populations with low basal LC n-3 PUFA tissue status are lacking, and so the clinical benefits of supplementing non-fish-eating groups with vegetarian sources of LC n-3 PUFA remain to be determined. Refocusing dietary LC n-3 PUFA intervention studies towards those individuals with a low LC n-3 PUFA tissue status may go some way towards reconciling results from randomised controlled trials with the epidemiological evidence.

Vitamin D deficiency as a public health issue: using vitamin D2 or vitamin D3 in future fortification strategies.

The role of vitamin D in supporting the growth and maintenance of the skeleton is robust; with recent research also suggesting a beneficial link between vitamin D and other non-skeletal health outcomes, including immune function, cardiovascular health and cancer. Despite this, vitamin D deficiency remains a global public health issue, with a renewed focus in the UK following the publication of Public Health England's new Dietary Vitamin D Requirements. Natural sources of vitamin D (dietary and UVB exposure) are limited, and thus mechanisms are needed to allow individuals to achieve the new dietary recommendations. Mandatory or voluntary vitamin D food fortification may be one of the mechanisms to increase dietary vitamin D intakes and subsequently improve vitamin D status. However, for the food industry and public to make informed decisions, clarity is needed as to whether vitamins D2 and D3 are equally effective at raising total 25-hydroxyvitamin D (25(OH)D) concentrations as the evidence thus far is inconsistent. This review summarises the evidence to date behind the comparative efficacy of vitamins D2 and D3 at raising 25(OH)D concentrations, and the potential role of vitamin D food fortification as a public health policy to support attainment of dietary recommendations in the UK. The comparative efficacy of vitamins D2 and D3 has been investigated in several intervention trials, with most indicating that vitamin D3 is more effective at raising 25(OH)D concentrations. However, flaws in study designs (predominantly under powering) mean there remains a need for a large, robust randomised-controlled trial to provide conclusive evidence, which the future publication of the D2-D3 Study should provide (BBSRC DRINC funded: BB/I006192/1). This review also highlights outstanding questions and gaps in the research that need to be addressed to ensure the most efficacious and safe vitamin D food fortification practices are put in place. This further research, alongside cost, availability and ethical considerations (vitamin D3 is not suitable for vegans), will be instrumental in supporting government, decision-makers, industry and consumers in making informed choices about potential future vitamin D policy and practice.

Knowing your genes: does this impact behaviour change?

It is postulated that knowledge of genotype may be more powerful than other types of personalised information in terms of motivating behaviour change. However, there is also a danger that disclosure of genetic risk may promote a fatalistic attitude and demotivate individuals. The original concept of personalised nutrition (PN) focused on genotype-based tailored dietary advice; however, PN can also be delivered based on assessment of dietary intake and phenotypic measures. Whilst dietitians currently provide PN advice based on diet and phenotype, genotype-based PN advice is not so readily available. The aim of this review is to examine the evidence for genotype-based personalised information on motivating behaviour change, and factors which may affect the impact of genotype-based personalised advice. Recent findings in PN will also be discussed, with respect to a large European study, Food4Me, which investigated the impact of varying levels of PN advice on motivating behaviour change. The researchers reported that PN advice resulted in greater dietary changes compared with general healthy eating advice, but no additional benefit was observed for PN advice based on phenotype and genotype information. Within Food4Me, work from our group revealed that knowledge of MTHFR genotype did not significantly improve intakes of dietary folate. In general, evidence is weak with regard to genotype-based PN advice. For future work, studies should test the impact of PN advice developed on a strong nutrigenetic evidence base, ensure an appropriate study design for the research question asked, and incorporate behaviour change techniques into the intervention.