Thursday, July 30, 2015

Vitamins: Water soluble-1: Sources, Functions, Deficiency etc

WATER SOLUBLE VITAMINS

VITAMIN B1 & B2
Vitamins
Vitamin B1
Vitamin B2
Other names
Thiamine, antiberiberi vitamin, antineuritic vitamin or aneurin
Riboflavin, Lactoflavin, vitamin G, Ovoflavin, or Yellow enzyme
Discovered by
C. Funk
Warburg and Christian (isolated from yeast)
Daily requirement
1.2-1.4 mg
1.4 mg in adult male
2.5 mg for children and pregnant ladies
Sources
Fortified breads, cereals, whole grains, lean meats, fish, dried beans, peas, soyabeans, nuts, liver, kidney, leafy vegetables and milk.
Richest source: whole wheat bread.
Yeast, liver, milk, cheese, curd, pulses, green leafy vegetables, eggs, kidney.
Synthesized by intestinal bacteria
Functions
Normal growth because it acts as a coenzyme TPP for decarboxylases. So it is involved in carbohydrate metabolism.
Normal growth because carbohydrate, protein and fat metabolism either as FMN or FAD.
Synthesis of rhodopsin
Deficiency
Beriberi.
Cardiovascular and musculature defects.
Glossitis.
Cheilosis.
Photophobia, itching and burning eyes.
Keratitis (Inflammation of skin).

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