Lecture 14 Fall 2009

Lecture 14 Fall 2009 - Water Soluble Vitamins Continued...

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Water Soluble Vitamins Continued Fall 2009 Prof Mutz
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Biotin (B7) Water soluble vitamin involved in energy metabolism and regulation of gene expression Differs from other W.S.V. in that it contains sulfur Obtained from both diet and biotin producing bacteria (biota) in large intestine Required for: Gluconeogenesis Citric Acid/Krebs cycle
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Dietary Sources Food Serving Size ug of bitoin Peanuts ¼ cup 47 ug Almonds 3 oz 17 ug Mushrooms 1 cup 11 ug Egg yolk 1 medium 8 ug Tomato 1 cup diced 6 ug Sweet Potato 1 medium 5 ug Salmon 3 oz 4 ug Avocado 1 medium 7 ug Adults AI 30ug/day
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Dietary Sources Dietary biotin easily absorbed in small intestine Not absorbed in presence of Avidin Protein present in egg whites that binds tightly to biotin, making it un-absorbable Alcohol Extreme heat
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Regulation and Function Biotin in food is bound to protein Enzymes release biotin from protein Free biotin absorbed in small intestine Bacteria synthesize biotin Do not make enough to meet our needs Thus, an essential nutrient Biotin creates enzymes involved in energy metabolism
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This note was uploaded on 10/15/2010 for the course HNSC HNSC25.1 taught by Professor Weintraub during the Spring '08 term at CUNY Brooklyn.

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Lecture 14 Fall 2009 - Water Soluble Vitamins Continued...

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