Dris identify the amount of a nutrient needed to

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DRIs identify the: Amount of a nutrient needed to prevent deficiency disease___________________ in healthy people Amount of a nutrient that may reduce the risk of chronic disease__________________ Upper level of safety for nutrients FOR HEALTHY PEOPLE
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How much of each nutrient do we need? EAR(estim ated average requireme nt) RDA(reco mmended dietary allowance) AI(adequa te intake) TUL(toler able upper intake level) EER(esti mated energy requirem ent) AMDR(acc eptable macronutri ent distribution range)
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Nutrient Amounts: Estimated Average Requirement (EAR) Average daily intake level of a nutrient that will meet the needs of 50% healthy people____________ __________________ Are used to determine the RDA of a nutrient Figure 1.9, page 15
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Recommended Dietary Allowance (RDA) The average daily intake level required to meet the needs of 97%- 98% HEALTHY people_________ ______________ _____ Aim for this amount Figure 1.9, page 15
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EAR vs. RDA Nutrient Intake Number of people 20 30 40 50 60 70 C A B EAR 45 units RDA 65 units
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Adequate Intake (AI) Interpreted the same as the RDA Recommended average daily intake level for a nutrient Used when we have less scientific evidence Used when the EAR is not established: vitamin K, fluoride Figure 1.9, page 15 AI???
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Tolerable Upper Intake Level (UL) Highest average daily intake level that is not likely to have adverse effects on the health of most people Consumption above the UL is not considered safe Figure 1.9, page 15
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Tolerable Upper Intake Level (UL) Highest average daily intake level that is not likely to have adverse effects on the health of most people Consumption above the UL is not considered safe Tolerable Upper Intake Level (UL) Danger of toxicity Marginal Safety Marginal Danger of deficiency DRI Recommended Intakes Figure 1.9, page 15
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Estimated Energy Requirement (EER) Average dietary energy intake(kcal) to maintain energy balance Based on age, gender, weight, height, and level of physical activity EER (MEN) = 662 – (9.53 × age [y]) + PA × (15.91 × weight [kg] + 539.6 × height [m]) EER (WOMEN) = 354 – (6.91 × age [y]) + PA × (9.36 × weight [kg] + 726 × height [m])
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Acceptable Macronutrient Distribution Range (AMDR) The percent range of total daily energy intake that should come from each macronutrient_______________ Associated with reduced risk of chronic disease Provides adequate levels of essential nutrients________________ Figure 1.4, page 13
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Macronutrients: Calculating AMDR Needs PROBLEM 4 Jeff consumes 2300 calories/day. How many grams of carbohydrates, fats, and proteins should he consume daily (expressed as a range )? Step 1: Calculate the range of kcal for each macronutrient using AMDR percentages Step 2: Convert kcals to grams by dividing the macronutrient kcals by the kcal per gram for each macronutrient. Carbs: 1035 kcal/4 kcal/gm=259 g and 1495/4=374 g Fats: 460/9=51 g and 805/9=89 g Proteins: 230/4=58 g and 805/4=201 g Carbohydrates Lower End 2300 * 0.45 1035 Upper End 2300 * 0.65 1495 Fats Lower End 2300 * 0.20 460 Upper End 2300 * 0.35 805 Proteins Lower End 2300 * 0.10 230 Upper End 2300 * 0.35 805
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Animation DRI Determinations
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Part 5 In Depth: New Frontiers
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In Depth: New Frontiers - Nutrigenomics Nutrigenomics studies the interactions among genes, the environment, and nutrition Key theory: foods and environmental factors can “switch” some genes on while turning off others Genes – specific sections of DNA that make individual proteins
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