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Chapter-16 Fat Soluble Vitamins (A, D, E and K)

BOOK TITLE: Textbook of Biochemistry for Dental Students

Author
1. Vasudevan DM
2. S Sreekumari
3. Vaidyanathan Kannan
ISBN
9789350254882
DOI
10.5005/jp/books/11333_16
Edition
2/e
Publishing Year
2011
Pages
7
Author Affiliations
1. Faculty of Medicine, Amrita Vishwa Vidyapeetham, (Amrita University), Kochi, Kerala, Formerly Principal, College of Medicine, Amrita, Kerala; Formerly, Dean, Sikkim Manipal Institute of Medical Sciences, Gangtok, Sikkim, Amrita Vishwa Vidyapeetham (Deemed University), Cochin, Kerala, E-mail: dmvasudevan@aims.amrita.edu, PG Programs and Research College of Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India, College of Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India; Sikkim Manipal Institute of Medical Sciences, Gangtok, Sikkim, India
2. Jubilee Mission Medical College, Trissur, Kerala, Sree Gokulam Medical College and Research Foundation, Thiruvananthapuram, Kerala, India, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India, Government Medical College, Thrissur and Thiruvananthapuram, Kerala, India; Sree Gokulam Medical College and Research Foundation, Thiruvananthapuram, Kerala, India; Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India
3. Amrita Institute of Medical Sciences, Kochi, Kerala, India, Pushpagiri Institute of Medical Sciences and Research Centre, Thiruvalla, Kerala, India, Believers Church Medical College and Hospital, Thiruvalla, Kerala, India
Chapter keywords

Abstract

Vitamin A may be retinol, retinal or retinoic acid. Beta carotene is a provitamin of vitamin A. Wald\'s visual cycle needs 11 cisretinal. Vitamin A deficiency leads to nyctalopia, xerophthalmia, Bitot\'s spots and keratomalacia. Dietary source of vitamin A is carrot, papaya, mango, fish liver oils. RDA of vitamin A is 1000 microgram for adults. Vitamin D is sun-shine vitamin; it is produced from 7-dehydro-cholesterol by sun\'s rays. Vitamin D3 is cholecalciferol. Vitamin D is a prohormone. Vitamin D is activated to calcitriol. Calcitriol promotes absorption of calcium. Deficiency of Vitamin D leads to rickets in children and osteomalacia in adults. RDA of vitamin D is 400 IU for adults. Vitamin E is most potent anti-oxidant. Vitamin K is necessary for coagulation. Prothrombin is a Vitamin K dependent factor. Vitamin K helps in formation of gamma carboxy glutamic acid.

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