VITAMINS
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VITAMINS
Vitamins are defined as " the organic substances which are necessary food factors required in small amounts to regulate energy transformation and metabolism. Vitamins are not energy source but they also work as food catalysts too. Vitamins are effective in very small amounts (milligrams or micrograms). Every vitamin has a specific function and deficiency of a particular vitamin in diet causes a specific disease. Vitamins are not formed in the body except vitamin D.
CLASSIFICATION OF VITAMINS
According to their solubility, vitamins are divided into two classes:
1. WATER SOLUBLE VITAMINS : Vitamin B- complex , Vitamin C
2. FAT SOLUBLE VITAMINS : Vitamin A, Vitamin D,Vitamin E and Vitamin K
VITAMIN A (Retinol)
FOOD SOURCES
Fats of milk, egg, liver fats, cod liver oil, carrot, butter, green vegetable , cheese etc.
FUNCTION
1. The main function of vitamin A" is to form VISUAL PIGMENT. Healthy teeth, saves from infectious diseases, softness of tissues .
2. It transports nutrients across the cell membrane.
SYMPTOMS DUE TO DEFICIENCY
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1. Night blindness leads to xerophthalmia .
3. Infectious diseases.
RDA (recommended daily allowance) : 1000 microgram
VITAMIN B- COMPLEX
B- complex is a group of 12 vitamns such as:
Vitamins B1 (Thiamine)
Vitamins B2 (Riboflavin )
Vitamin B5 ( Niacin)
Vitamins B6 pyridoxine )
vitamin B12 (cyano cobaltamine)
lipoic acid
Biotin acid
Folic acid
Inosital
Panothenic acid.
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VITAMIN B1 ( THIAMIN )
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.
FOOD SOURCES
Liver, kidney, cereal, nuts, eggs yolk, legumes, fish, meat, fruits etc.
FUNCTION
It helps body cells to convert carbohydrates into energy.
Healthy heart function.
Healthy nerve cells .
Brain functioning.
DISEASES

Beri Beri , heart failure, Loss of weight, digestive disturbance, weakness , nerve damage, constipation

R.D.A
1.1 to 1.5 mg

Note
Improper cooking and too much washing can lose the activity of this vitamin.

VITAMIN B2( RIBOFLAVIN )
.
FOOD SOURCES
Milk, egg, liver, fish, yeast, fruits, green leafy vegetables, wheat , pea, soybean.
FUNCTIONS
Body growth, red cell production, helper for other B- vitamins
DISEASES
Dry & cracked skin, inflammation on mouth, anemia, eye diseases, poor general health, scales on nails.
R.D.A
1.3 to 1.7 mg
Note
It is light ( sun light ) sensitive
VITAMIN B6 ( PYRIDOXINE )
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FOOD SOURCES
Milk, liver, yeast, green leafy vegetables , cereals, kidney, fish, eggs, nuts etc.
FUNCTIONS
Protein and fatty acid metabolizer
Red cells production.
Brain function.
Helps to synthesize antibodies.
DISEASES
Skin disorders, digestive problems, anaemia
R.D.A
2.2 mg
Note
It is Sensitive to sun light air and heat.
Large dosages can lead to neurological disorders.
NICOTINIC ACID
( NIACIN )
.
FOOD SOURCES
Red meat, liver, yeast, peanut, fish, eggs etc.
DEFICIENCY PROBLEMS
Mental disturbances
Diarrhoea
Pellagra
Skin lesions.
R.D.A
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14 mg to 19 mg
Note
It is stable towards heats light acid & alkalis.
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