Thursday, July 30, 2015

Vitamins: Water soluble-2: Sources, Functions, Deficiency etc

WATER SOLUBLE VITAMINS

VITAMIN B3 & B5
Vitamins
Vitamin B3
Vitamin B5
Other names
Niacine, Nicotinamide, pellagra preventing factor, anti-pellagric factor
Pantothenic acid, yeast factor, chick antidermatitis factor or anti-greying factor
Discovered by
C. Funk
R.J Williams
Daily requirement
13-18 mg
5-10 mg
Sources
Fish, liver, red meat, yeast, grains, peas, beans, fruits, cereal husks, green leafy vegetables. Egg yolk.
Liver, yeast, green vegetables, grains, kidney, intestinal bacteria, egg yolk.
Functions
All biological oxidation- reduction reactions as NAD or NADP.
As H-receptor in dehydrogenation reactions.
In metabolism as coenzyme A. e.g. Acetyl Co~A
Deficiency
Pellagra
(4-D syndrome: Diarrhoea, Dermatitis, Dementia, Death)
Dermatitis in chicken.
Neuromuscular dysfunction and fatigue.
Poor growth.
Early ageing and graying of hair.
“Burning feet” syndrome.

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