FAT SOLUBLE VITAMINS
VITAMIN A & D
Vitamins
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Vitamin A
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Vitamin D
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Other names
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Retinol, carotenoid, anti- xerophthalmic
vitamin,
Vitamin of growth
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Antirachitic vitamin, Calciferol, sunshine
vitamin
5 forms: D1, D2, D3,
D4, D5
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Discovered by
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Mc Collum and Davis (isolated by Holmus)
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Steenbock and Hess
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Daily requirement
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2 mg
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0.01 mg
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Sources
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Carrots, pumpkin, sweet potatoes, tomato,
yellow coloured fruits, pink grape fruits, apricots, leafy vegetables
(Animals synthesize this vitamin from carotene. So it is called Provitamin A.
Fish liver oil, butter, egg yolk, milk, cod
liver oil, ghee
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Fish liver oil, butter, milk, egg, cheese,
margarine, cream, oysters & cereals.
Synthesized in skin from ergosterol
(Provitamin D)
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Functions
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Synthesis of muco- polysaccharides so
important for body growth.
Maintain integrity and secretory activity of
epithelial glandular cells.
Night vision.
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Ca/ P
balance.
Increase
absorption of Ca from intestine.
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Deficiency
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Nyctalopia (Henerolopia).
Xerophthalmia.
Dermatitis.
Increased susceptibility to infection and
cancer.
Keratomalacia (Toad’s skin).
Stunted growth.
Sterility.
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Rickets (in children).
Osteomalacia (Especially in pregnant woman).
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