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NUTR 1010 (27)
Chapter 1

Textbook chapter 1 notes

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University of Guelph
NUTR 1010
Andrea Buchholz

Chapter 1 The Role of Nutrition in our HealthWhat is NutritionNutrition is the science that studies food and how food nourishes our bodies and influences our healthoIt compasses how we consume digest metabolize and store nutrients and how these nutrients affect our bodiesoInvolves studying the factors that influence our eating patterns making recommendationsabout the amount of each type of food we should eat attempting to maintain food safetyand addressing issues related to the global food supplyEarly research in nutrition focused on making the link between nutrient deficiencies and illnessWhy is Nutrition ImportantWe know that proper nutrition can help us improve our health prevent certain diseases achieve and maintain a desirable weight and maintain our energy and vitalityMost substances you take into your body are broken down and reassembled into your brain cells bones musclesall of your tissues and organsNutrition is one of Several Factors Contributing to HealthHealth used to refer to the absence of diseaseHealtha state of complete physical mental and social wellbeing and not merely the absence of disease or infirmityHealth is now defined as a multidimensional process that includes physical activity and occupational social emotional intellectual and spiritual healthTwo aspects of health nutrition and physical activityoOur overall state of nutrition is influenced by how much energy we expend doing daily activities and our level of physical activity has a major impact on how we use the nutrients in our foodA Nutritious Diet can prevent some Diseases and reduce your risk for othersThe discoveries of the nutrient deficiencies have aided nutrition experts in developing guidelines for diets that can prevent deficiency diseasesAmple food supply and the fortification of foods with nutrients have ensured that the majority of nutrient deficiency disease are no longer of concern in developed countriesNutritious diet can reduce your risk for chronic diseases Obesity and its accompanying diseases are significantly affected by nutrition and activity regularly consuming foods that are high in total energy total fat and saturated fat and low in fiber fruits vegetables and whole grains is associated with an increased risk for obesity heart disease type 2 diabetes and some forms of cancerUnder nutritionmeaning a diet that lacks energy or specific essential nutrientsis known to cause deficiency diseases such as anemia and scurvyEssential nutrientsare ones that cant be manufactured by the human body at all or not in amounts sufficient to meet the bodies needs and must come from either food in the diet or nutrient supplementsOver nutritiona diet that has an imbalance of fats carbohydrates and protein or simply too much energyhas a strong association with diseases such as type 2 diabetes and heart disease and it appears to play a role in some forms of cancerMalnutritionor bad nutrition refers to both under nutrition and over nutritionWhat are NutrientsMost foods are made up with different chemicalsoSome chemicals are not useful to the body whereas others are critical to human growth and functionLatter chemicals are referred to as nutrients carbohydrates lipids fats proteins vitamins minerals and waterFour classes of organic nutrients contain an element called carbon that is an essential component
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