3.1.1%20water%20soluble%20vitamins-r

3.1.1%20water%20soluble%20vitamins-r - 3.1.1 Water Soluble...

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3.1.1 Water Soluble Vitamins
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Overview of Vitamins  essential for good health  organic molecules  individual units  regulate body processes  micronutrients  solubility – fat or water
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Water Soluble Vitamins   B-complex ; B 1 (thiamin);  B 2 (riboflavin); B 3 (niacin);  B 5 (pantothenic acid);  B 6 (pyridoxine); B 7 (biotin);  B 12 (cobalamin); folate   Vitamin C  (ascorbic acid
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General Characteristics Vitamins in Food Attached to a protein; may be destroy during  cooking or during storage Absorption Mostly in small intestine; diffusion or active  transport; altered bioavailabilty Circulation In bloodstream, 1 st  stop is liver Excretion For most B vitamins the kidneys filter out excess  which is excreted in urine Toxicity  Minimal effect, although some exist Function B vitamins are coenzymes in energy  metabolism + other functions; Vitamin C acts as  antioxidant
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Fig 10.3   B vitamins and energy metabolism
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Thiamin (B 1 ) • Functions:   * coenzyme in energy metabolism  *nerve  function  Food Sources:  whole grains, enriched grains,  pork,  legumes, tuna, some fruits  Deficiency: beriberi  Toxicity: No
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3.1.1%20water%20soluble%20vitamins-r - 3.1.1 Water Soluble...

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