MOCK57 - Metabolic Integration and Nutrition Medical...

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Unformatted text preview: Metabolic Integration and Nutrition Medical Biochemistry Lecture #57 Nutrients: There are Three Macronutrients Macronutrients Fat Protein Carbohydrate Micronutrients Vitamins Minerals Macrominerals Ca, P, Na, Cl, K, and Mg Microminerals Macronutrients: Units of Measure Sucrose molecular weight of 342 mmol = 342 mg = .34 g Starch Very large glucose polymer Variable molecular weight Hundreds to thousands of residues Macronutrients: Units of Measure Each residue will contribute 162 daltons M.W. glucose (180 mg/mmol) - M.W. water (18 mg/mmol) 162 mg/mmol of residues x 1,000 residues = 162,000 mg = 162 g > 500 times as much food and fuel as one mmol of sucrose Grams? US diet is approximately 40% fat 40% carbohydrate 20% protein % of energy provided Macronutrients: Units of Measure Heats of Combustion & Energy Available from Major Food Sources Energy kcal/g (kJ/g) Protein Fat Carbohydrate Ethanol Heat of Combustion (Bomb Calorimeter) Human Oxidation Standard Conversion Factors 5.4 (22.6) 9.3 (38.9) 4.1 (17.2) 7.1 (29.7) 4.1 (17.2) 9.3 (38.9) 4.1 (17.2) 7.1 (29.7) 4 (17) 9 (38) 4 (17) 7 (29) How Many g Protein Consumed? 20% of 40 kcal = kg d 8 kcal protein x kg d 1 g protein = 4 kcal protein 2 g protein kg d Macronutrient: Intake Assume 70 kg consuming 3000 kcal/d 40% 40% CHO CHO 40% 40% Fat Fat 20% 20% Protein Protein Energy (kcal) Intake (g) Intake (g/kg) Content (kcal/g) 1200 600 4 9 4 300 133 150 4.3 1.9 2.1 1200 Energy & Protein Requirements...
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MOCK57 - Metabolic Integration and Nutrition Medical...

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