NUTR SCI 132 Study Guide - Midterm Guide: Refined Grains, Blood Alcohol Content, Saturated Fat
28 Aug 2016
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Document Summary
Ecology: study of the flow of nutrients & energy through the environment. Nutrition: meeting place b/t medicine & agriculture & b/t health & the environment. Nutrient = essential: specific chemical/chemical compound, dri"s (dietary reference intakes): recommended amount of each nutrient, essential. Can"t be synthesized (have to eat it, body can"t make it) Essential nutrient must be present in the diet for good health: states: How to establish optimal range: balance studies: Try to find the level of intake that maintains a constant supply of nutrient to allow the body to function at its best. Researchers measure food intake & nutrient losses in urine, feces, sweat, & skedded skin cells: optimal range is different for everybody, assume these needs have a normal distribution (graph with a hump) Middle of graph (hump) = estimated average. Allowance (rda: most nutrients: rda is set at 2 standard deviations than the mean. Toxicity (rarely occurs from natural food, mostly from supplements or fortified foods)
