Lect14 Water-soluble Vitamins

Lect14 Water-soluble Vitamins - Why do we need to eat...

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1 Why do we need to eat Vitamins? Lack ability to make essential chemicals Prevent deficiency Prevent birth defects • Improve Health? Slow Aging?????? • Should we treat the symptom : “low vitamin status”? • Or treat the underlying cause : the need for a complete diet?? Absorption of Vitamins Loss of Vitamins during Food Preparation • Exposure to oxygen, heat or light • Leach out into cooking water • Milling of grains – Grain/cereal products enriched with: Folate, Thiamin, Riboflavin, Niacin, Iron – Still lack Fiber, trace minerals Vitamins act as Cofactors for enzymes
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Role of Vitamins in Energy Metabolism Folate -- Folic Acid Function : Synthesis of DNA, RNA, amino acids Converts Vitamin B12 to active form Food sources : foliage, green vegetables, grains, legumes, Fortified breads & cereals Folate Deficiency • Megaloblastic anemia • Spina Bifida • GI tract deterioration • Anti-folates given as cancer drugs: e.g. Methotrexate:
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This document was uploaded on 02/05/2011.

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Lect14 Water-soluble Vitamins - Why do we need to eat...

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