NST10_Spr08_Lecture10 - Vitamins Organic compounds that...

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Vitamins - Organic compounds that assist in the regulation of body’s physiological processes. Micronutrients - Nutrients needed in relatively small amounts to support body functions and health: vitamins and minerals.
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Water Soluble Vitamins Water Soluble Vitamins Fat Soluble Vitamins Fat Soluble Vitamins Dissolve in water Readily excreted Function: coenzymes Subject to cooking loss Fat soluble Stored in tissues Function: hormones Absorbed by lymphatic system with fats
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Why do we need to eat Vitamins? Lack ability to make essential chemicals Prevent deficiency Prevent birth defects Do we need to take “Daily Vitamins”?
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Loss of Vitamins during Food Preparation Exposure to Oxygen Vitamins may degrade after harvesting Leak out into cooking water Destroyed by heat or light
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Whole grains contain original nutrients! Many nutrients lost through milling Grain/cereal products enriched with: Folate, Thiamin, Riboflavin, Niacin, Iron Still deficient: Fiber, Vit B 6 , Mg & Zinc
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B Vitamins: Thiamin Riboflavin Niacin Vitamin B 6 1. Function as co- enzymes (cofactors) 2. Participate in energy metabolism 1. 50-90% are absorbed
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Cofactor Old style Nature 433, E10 (3 February 2005) Biochemistry: Role of PQQ as a mammalian enzyme cofactor?
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