sci241_week5_reading1

sci241_week5_reading1 - (Reinhard/Age Fotostock America Inc...

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(©Reinhard/Age Fotostock America, Inc.) C H A P T E R 8 C O N C E P T S ± Thiamin, riboflavin, niacin, biotin, and pantothenic acid are B vitamins needed to produce ATP from carbohydrate, fat, and protein. ± Vitamin B 6 is important for amino acid metabolism as well as energy production. ± Folate is a coenzyme that is needed for cell division. ± Vitamin B 12 , only found in animal foods, is needed for nerve function and to activate folate. ± Vitamin C is needed to form connective tissue and acts as a water- soluble antioxidant. ± Vitamin A is essential for vision, and it regulates cell differentiation and growth. ± Vitamin D is necessary for bone health. ± Vitamin E is a fat-soluble antioxidant. ± Vitamin K is essential for blood clotting. Do vitamins give you extra energy? Should everyone take folate supplements? Does eating carrots improve your vision? Can vitamin E protect you from heart disease? J u s tA T as t e
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Vitamin D Concerns on the Rise By Karen Collins, R.D. Dec. 5, 2003—A lack of vitamin D—thought to be a problem of a bygone era—is showing up in growing numbers of women, children, and the elderly, increasing the risk of bone disease and possibly other health problems. Exposing only the face, hands, and forearms to sunlight for 10 to 30 minutes, just two or three days a week, can usually produce all the vitamin D we need. Longer exposure doesn’t produce more of this vitamin. Yet today, many people’s lifestyles and locations do not allow them to produce enough, making dietary sources vital. For more information on vitamin D concerns go to www.msnbc.msn.com/id/3660416. 235 8 The Vitamins Vitamins Are Vital to Your Health Vitamins Provide Many Different Functions in the Body Vitamins Are Found in Almost Everything You Eat We Need Enough but Not Too Much of Each Vitamin Some Vitamins Are Soluble in Water and Others Are Soluble in Fat Many B Vitamins Are Essential for Energy Production Thiamin: Important for Nerve Function Riboflavin: A Bright Yellow Vitamin Niacin: Deficiency Caused an Epidemic of Mental Illness Biotin: Eggs Contain It but Can Block Its Use Pantothenic Acid: Widely Distributed in Food and Widely Used in the Body Vitamin B 6 Is Important for Protein Metabolism Vitamin B 6 Is Needed to Synthesize and Break Down Amino Acids Both Animal and Plant Foods Are Good Sources of Vitamin B 6 Too Much Vitamin B 6 Is Toxic Folate and Vitamin B 12 Are Needed for Cell Division Folate: Important for Rapidly Dividing Cells Vitamin B 12 : Absorption Requires Intrinsic Factor Vitamin C Saved Sailors from Scurvy Vitamin C Is Needed to Maintain Connective Tissue Vitamin C Is a Water-Soluble Antioxidant Citrus Fruit Is One of the Best Sources of Vitamin C Vitamin C Is the Most Common Vitamin Supplement Choline: Is It a Vitamin?
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This note was uploaded on 12/03/2010 for the course SCI 241 taught by Professor Williams during the Winter '10 term at University of Phoenix.

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sci241_week5_reading1 - (Reinhard/Age Fotostock America Inc...

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