Macronutrients fats proteins carbohydrates how does

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Unformatted text preview: y. Delivers a lot of macro and micro nutrients per kcalorie Where is this food energy?.......chemical bonds (ATP) Which nutrients provide energy?.......macronutrients fats, proteins, carbohydrates How does our body use this food energy?.......metabolism to support life ***ENERGY BALANCE EQUATION*** Energy IN = Energy OUT + E STORAGE Macro = Macro Nutrient Combustion + CHO (liver, skeletal muscles) Lipids (adipose) TYPE OF FOOD Proteins PHYSICAL ACTIVITY LEVEL, DISEASE, DRUGS (effects whether we store or combust macro) LS 2N03 – Human Nutrition for Life Sciences D.M. Pincivero, 2013 12 How much energy do the macronutrients provide? Carbohydrates = 4 kcal/gram Protein = 4 kcal/gram Lipids (fats) = 9 kcal/gram Example: One half avocado • 101 grams, 2 g protein, 9 g carbohydrates, 15 g fat = 161 kcalories Doesn’t add up!!!! = (2 x 4) + (9 x 4) + (15 x 9) = 179 kcalories Why not?.....hint…..a carb is a carb is a carb? Monounsaturated fat is good for you however they still carry a large amount of calories. Not all carbs are the same: 161 = amount of energy available to our cells 179 = total calories in food item: what is available to us + fibre The remaining calories are in fibre which our digestive system cannot break up and absorb LS 2N03 – Human Nutrition for Life Sciences D.M. Pincivero, 2013 13 DIETARY REFERENCE INTAKES Standards defined for energy nutrients, other dietary components, physical activity Recommendations apply to healthy people May be different for specific groups LS 2N03 – Human Nutrition for Life Sciences D.M. Pincivero, 2013 14 DIETARY REFERENCE INTAKES Estimated Average Requirement (EAR) • The average daily intake level of a nutrient that will meet the needs of half of the people in a particular category. Used to establish the RDA Recommended Dietary Allowances (RDA) • The average daily intake level required to meet the needs of 97 – 98% of people in a particular category. Based on age and requirement Listed on nutritional labels Example: Protein intake for a 19 year old woman = 46 grams/day (10-35%) Number in parenthesis is AMDR Absolute vs....
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This document was uploaded on 02/14/2014.

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