Health is defined as “the state of the organism when it functions optimally without evidence of disease”. Surprisingly, the words “microbes” or “microorganism” are missing in this definition. The regulation of gut microbiota is mediated by an enormous quantity of aspects, such as microbiological factors, host characteristics, diet patterns, and environmental variables. Some protective, structural, and metabolic functions have been reported for gut microbiota, and these functions are related to the regulation of homeostasis and host health. Host defense against pathogens is, in part, mediated through gut microbiota action and requires intimate interpretation of the current microenvironment and discrimination between commensal and occasional bacteria. The present Special Issue provides a summary of the progress on the topic of intestinal microbiota and its important role in human health in different populations. This Special Issue will be of great interest from a clinical and public health perspective. Nevertheless, more studies with more samples and comparable methods are necessary to understand the actual function of intestinal microbiota in disease development and health maintenance.

This book is a printed edition of the Special Issue "Nutrition and Chronic Conditions" that was published in Nutrients

Abstract: The determination of protein and energy needs in developing nations is complicated by insufficient data, degree of social stress, presence of disease and infection, and differences of individuals and population. An attempt is being made, however, to define the necessary allowances for recovery from infection or mild malnutrition and for the maintenance of health. The crucial questions revolve around relative requirements under prevailing conditions, whether there are indeed different requirements for different populations, and whether those requirements can be determined in reference to healthy, will-fed populations. These questions are addressed through information on known protein and energy requirements for health maintenance and tissue repletion, and nutritional consequences of infections. Recommendations are outlined for research priorities.

The 21st century has witnessed a complete revolution in the understanding and description of bacteria in eco- systems and microbial assemblages, and how they are regulated by complex interactions among microbes, hosts, and environments. The human organism is no longer considered a monolithic assembly of tissues, but is instead a true ecosystem composed of human cells, bacteria, fungi, algae, and viruses. As such, humans are not unlike other complex ecosystems containing microbial assemblages observed in the marine and earth environments. They all share a basic functional principle: Chemical communication is the universal language that allows such groups to properly function together. These chemical networks regulate interactions like metabolic exchange, antibiosis and symbiosis, and communication. The National Academies of Sciences, Engineering, and Medicine's Chemical Sciences Roundtable organized a series of four seminars in the autumn of 2016 to explore the current advances, opportunities, and challenges toward unveiling this "chemical dark matter" and its role in the regulation and function of different ecosystems. The first three focused on specific ecosystemsâ€"earth, marine, and humanâ€"and the last on all microbiome systems. This publication summarizes the presentations and discussions from the seminars.

There is no other time in life when the provision of adequate and balanced nutrition is of greater importance than during infancy and childhood. During this dynamic phase characterized by rapid growth, development and developmental plasticity, a sufficient amount and appropriate composition of nutrients both in health and disease are of key importance for growth, functional outcomes such as cognition and immune response, and the metabolic programming of long-term health and well-being. This compact reference text provides concise information to readers who seek quick guidance on practical issues in the nutrition of infants, children and adolescents. After the success of the first edition, which sold more than 50'000 copies in several languages, the editors prepared this thoroughly revised and updated second edition which focuses again on nutritional challenges in both affluent and poor populations around the world. Serving as a practical reference guide, this book will contribute to further improving the quality of feeding of healthy infants and children, as well as enhancing the standards of nutritional care in sick children.

Gut Microbiota: Interactive Effects on Nutrition and Health focuses on the fascinating intestinal microbiome as it relates to nutrition. The book covers the core science in the microbiome field and draws links between the microbiome and nutrition in medicine. Reflecting the most current state of evidence available in the field, the early chapters introduce key concepts about the microbiome, and the latter focus on the application of the gut microbiome and nutrition science. Both human studies and animal studies (where appropriate) are discussed throughout the work. Addressing topics such as gut microbiota throughout the lifespan, gut microbiota in health and disease, and genetic and environmental influences on gut microbiota, this book will provide scientists and clinicians who have an interest in the microbiome with an understanding of the future potential and limitations of this tool as they strive to make use of evidence-based diet information for the maintenance of good health. - Explores how diet influences gut microbiota - Consolidates new research on how gut microbiota affects nutrition - Identifies how the research applies to food science - Provides practical diet suggestions for improving health

As aging trends in the United States and Europe in particular are strongly suggestive of increasingly older society, it would be prudent for health care providers to better prepare for such changes. By including physiology, disease, nutrition, pharmacology, pathology, radiology and other relevant associated topics, Geriatric Gastroenterology fills the void in the literature for a volume devoted specifically to gastrointestinal illness in the elderly. This unique volume includes provision of training for current and future generations of physicians to deal with the health problems of older adults. It will also serve as a comprehensive guide to practicing physicians for ease of reference. Relevant to the geriatric age group, the volume covers epidemiology, physiology of aging, gastrointestinal physiology, pharmacology, radiology, pathology, motility disorders, luminal disorders, hepato-biliary disease, systemic manifestations, neoplastic disorders, gastrointestinal bleeding, cancer and medication related interactions and adverse events, all extremely common in older adults; these are often hard to evaluate and judge, especially considering the complex aging physiology. All have become important components of modern medicine. Special emphasis is be given to nutrition and related disorders. Capsule endoscopy and its utility in the geriatric population is also covered. Presented in simple, easy to read style, the volume includes numerous tables, figures and key points enabling ease of understanding. Chapters on imaging and pathology are profusely illustrated. All chapters are written by specialists and include up to date scientific information. Geriatric Gastroenterology is of great utility to residents in internal medicine, fellows in gastroenterology and geriatric medicine as well as gastroenterologists, geriatricians and practicing physicians including primary care physicians caring for older adults.

This volume provides a comprehensive overview on developmental origins of health and disease regarding various factors related to the origins of non-communicable diseases (NCDs) from early life. It offers a summary of the impacts of various factors such as epigenetics; gene-environment interaction; ethnic predisposition to NCDs and their risk factors; prenatal factors; fetal programming; maternal weight status and weight gain during pregnancy; type of feeding during infancy; growth pattern during childhood; obesity; stunting; socioeconomic status; dietary and physical activity habits; as well as environmental factors including air pollution and global climate change on the development and progress of NCDs.

An innovative and integrative avenue toward understanding and treating mental health disorders Psychoimmunology is a rapidly maturing area of scientific endeavor that provides a compelling integrative link between the immune system and its response to stress and psychiatric illness. Stress initiates pathological changes by activating the immune and endocrine systems. Inflammation is at the core of the complex and interactive systems that both contribute to and result from psychopathology. Consequently, inflammation research advances our knowledge of the pathology of depression, schizophrenia, chronic fatigue syndrome, posttraumatic stress disorder and a host of co- morbid conditions, notably diabetes, cardiovascular disease and cerebrovascular disease. The possible mechanisms underlying the bidirectionality of co-morbid medical and psychiatric disorders can be viewed as a consequence of inflammatory changes. These emerging novel concepts illustrate how the knowledge of inflammation can enable meaningful integration of psychopathology with physical co- morbidity. The innovative articles in this volume highlight the intricate link between psychiatry and psychoimmunology and underscore the central role of inflammation in furthering our understanding of the pathophysiology underlying mental health and illness.