Ch. 1 - Nutrition Chapter 1 Nutrients substances in food...

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Nutrition Chapter 1 Nutrients :  substances in food that provide us with energy and structure and regulate body processes. Essential Nutrients :  nutrients that must be consumed in the diet to maintain health. -over 40 different essential nutrients Nutrient Intake -Healthy diet= average intake over a period of days or weeks that provide all the nutrients needed Nutrient Density :  a measure of the nutrients provided by a food relative to its calorie content.  -more nutrient-dense foods contain more nutrients per calorie than do less nutrient-dense foods. Current and Future Health Malnutrition :  any condition resulting from an energy or nutrient intake either above or below that which is optimal -this can affect health in 20-40 years from now Undernutrition :  a condition resulting from an intake of calories or nutrients below that which meets nutritional  needs Vitamins: vitamin A needed for vision vitamin D needed for healthy bones -degree of deficiency determines symptoms -mild deficiency may cause nonspecific symptoms (fatigue or decreased ability to fight infections) -severe deficiency may cause dramatic symptoms (blindness or bone deformities) -some deficiencies may cause symptoms to appear quickly Vitamin Overdose:  too much iron can cause liver failure too much vitamin B6 can cause nerve damage Overnutrition
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