Nutrition is the provision to cells and organisms of the materials necessary (in the form of food) to support life. Many common health problems can be prevented or alleviated with good nutrition. An organism's diet refers to what it eats. Dietitians are health professionals who specialize in human nutrition, meal planning, economics, preparation, and so on. They are trained to provide safe, evidence-based dietary advice and management to individuals (in health and disease), as well as to institutions. Poor diet can have an injurious impact on health, causing deficiency diseases such as scurvy, beriberi, and kwashiorkor; health-threatening conditions like obesity and metabolic syndrome, and such common chronic systemic diseases as cardiovascular disease, diabetes, and osteoporosis.
Medicine is the practice of maintaining and restoring human health through the study, diagnosis, and treatment of patients whose death it is the discipline's ultimate concern to avert. It has traditionally been regarded as both an art and a science: the term is derived from the Latin ars medicina meaning the art of healing. Whilst health science and biomedicine, clinical medicine, surgery and research are together the very bedrock of contemporary medicine, successful face-to-face relief of actual suffering resulting from disease and injury continues to require the intangible application of human feeling and compassion.
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