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VITAMINS
Dr. Muhammad Sarfraz
M.B.B.S., M.Phil.(Pharmacology)
Senior Demonstrator
Quaid-e-Azam Medical College
Bwp.
1
VITAMIN
 Chemically Unrelated
Organic Compounds
Required In The Diet in Small
Amounts
Cannot be synthesized in body
Maintenance Of Normal
Function And Growth
2
VITAMIN
Deficiency
CAUSES A SPECIFIC DISEASE
• Cured Or Prevented
Only By Restoring The
Vitamin To The Diet 3
Vitamins are cofactors they
don’t do anything by
themselves
They are not a source of
calories
4
DIFFERENCE FROM OTHER FOOD
STUFFS
• NOT INCORPORATED INTO
TISSUE STRUCTURE
(AS PROTEINS)
• DON’T UNDERGO DEGRADATION
FOR PROVIDING ENERGY
(AS CHOs AND LIPIDS )
5
DIFFERENCE FROM OTHER FOOD
STUFFS
• B-Complex Vitamins Role As
Co-enzymes
•Energy Transformation
Reactions In Body
6
DIFFERENCE FROM
HORMONES
• NOT BEING PRODUCED
WITHIN THE ORGANISM
(exception vit.D)
• MOST OF THEM HAVE TO BE
PROVIDEDED IN DIET
7
CLASSAFICATION
BROAD CLASSIFICATION
(SOLUBILITY)
8
CLASSAFICATION
• FAT SOLUBLE
• VIT. A , D , E & K
9
CLASSAFICATION
WATER SOLUBLE
FUNCTION MAINLY AS
ENZYME COFACTORS
10
CLASSAFICATION
WATER SOLUBLE
• VIT. C
(ASCORBIC ACID)
(scurvy )
• VIT. B COMPLEX GROUP
• B1... THIAMINE (beriberi)
• Riboflavin... (cheilosis,
glossitis, seborrhea) 11
CLASSAFICATION
WATER SOLUBLE
• NIACIN... (Pellagra)
• NICOTINIC ACID
• B6…. PYRIDOXINE
• PANTOTHENIC ACID
12
• BIOTIN
• FOLIC ACID GROUP
Megaloblastic Anemia
Neural Tube Defects
13
• B12… Cyanocobalamin
(megaloblastic anemia and
pernicious anemia)
OTHER WATER
SOL.VITAMINS
• INOSITOL, PABA &
CHOLINE
14
Folic acid
Vitamin B12
•Vitamins B-complexVITAMINS
FAT SOLUBLE VITAMINS
• Hydrophobic
Compounds
• Absorbed Efficiently
Only When There Is
Normal Fat Absorption
16
FAT SOLUBLE VITAMINS
Transported in the
blood in lipoproteins
or attached to
specific
binding proteins
17
18
19
20
FAT SOLUBLE VITAMINS
Vitamin A
Vision
Cell Differentiation
Maintenance of epithelium
Control of infection
Control of keratinization21
FAT SOLUBLE VITAMINS
• Vitamin D
Calcium And Phosphate
Metabolism
Cell Differentiation
22
FAT SOLUBLE VITAMINS
Vitamin E
Anti-oxidant
Vitamin K
coenzyme
Blood Clotting
Bone formation
23
FAT SOLUBLE VITAMINS
• Dietary deficiency
• Conditions Affecting The
Digestion
And Absorption
Of The Lipid-soluble
Vitamins
Can lead to
abnormalities 24
Vitamin A
• Night blindness,
xerophthalmia And blindness
• Hyperkeratinization
• Infertility
• Infections
• Urinary stones formation
25
26
27
28
29
Vitamin D
•Rickets In Young
Children
•Osteomalacia In Adults
30
31
Vitamin E
•Neurologic disorders
•Hemolytic anemia
of the newborn
32
Vitamin K
Hemorrhagic
disease of the
newborn
33
Toxicity
can result from
excessive intake of
vitamins “A” and “D”
34

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VITAMINS