1 pp CHO 2011 - Carbohydrates Overview Overview...

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Unformatted text preview: Carbohydrates Overview Overview Carbohydrate Digestion Carbohydrate Absorption Glucose & galactose • Active transport by SGLT1 Fructose • Facilitative transport by GLUT5 Carbohydrate Metabolism Dietary Carbohydrate Essential! Minimum Dietary Requirement • Minimum amount carbohydrate required to avoid ketosis – ~50 grams/day • Glucose is essential energy source for brain, red blood cells, renal medulla – Daily amount used ~180 grams/day –~130 g/day can be produced from non-carbohydrate sources (gluconeogenesis) • 180-130 g/day = 50 gram minimum dietary requirement Dietary Carbohydrate Essential! Minimum Dietary Requirement Mininimum CHO Requirement • Low-carbohydrate diet w/ < 50 gm/day – CHO deficient side effects • Ketosis • Na & K depletion • Dehydration • Weakness • Muscle wasting • CNS effects • Kidney stress Carbohydrate Consumption • Most individuals eat considerably > 100 g/day –2000 kcal/day; 40 % carb; 800 cal ÷ 4 = 200 g/day 2002 Carbohydrate RDA...
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1 pp CHO 2011 - Carbohydrates Overview Overview...

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