noartno
07-14-2008, 10:25 PM
Vitamins
Introduction
Vitamins are essential in stiumlating & supporting metabolic pathways , with no claroies provided by them
vitamin definicy result when less vitamin intkae result, wher hypervitaminosis result in case of excess intake
vitamines could be classifeid into two groups
water-soulble vtiamines
Fat-soulbule vitamine
water-soluble vitamines includes
B1 --- Thiamine
B2 --- Riboflavin
B3 --- Niacin
B6 --- Pyridoxin
B12 --- Cobalamin
C --- Ascorbic acid
Folat
biotin
Pantothenic acid
Fat- soluble vitamins
A
D
Water soluble vitamins have little storage, most excess of water soluble vitamins are excreted in urine in contrast, excess of fat soluble vitamins may be toxic , & because of this it should has a store. when storage is already saturated, any excess will be toxic
-*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*
Vitamin D
Vitamin D (has a hormnal effects) precursor in the skin is 7-dehydrocholestrol (in subcutaneous fat), when ultraviolet light reaches the 7-dehydrocholestrol in subcutaneous fat, 7-dehydrocholestrol is activated
activated 7-dehydrocholestrol migrates to the liver then to the kidney, where the activation process is completed & the compound becomes vitamin D.
__*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_ *_*
Vitamin A
its a very important vitamin, & present into the body in three forms, retinol, retinoic acid & retinal
Retinoal is the storable form of vitamin A & its the father of vitamin A ; because it could be converted to the other form ; thats mean any difeincy in retinoal will lead consequently to the definicy in retinal & retinocic acid
retinoal is a hormone , working in bone tissue in growth, sexual function & immune system
Vitamin have two source, animal source & plant source
beta-cartene is a plant source of vitamin A , & is partially convereted into our bodies into retinoal ; but remmber that not all beta-cartene could be convereted into our bodies into retional (note retinoal present in animal food) beta- cartene is antioxident
Retinoic acid is used reepitheliazation ,also used in the onitments to treat trace because retinoic acid encourgae reepilization
Retinal is present in the retina & help to see in darkness
Retinol deficinecy can cause
Immunodeficiency in childeren
imapried growth in chlideren
sexual impotency in childeren
retinal & retinoic acid definicy because retinol is the father of vitamin A as we said
Introduction
Vitamins are essential in stiumlating & supporting metabolic pathways , with no claroies provided by them
vitamin definicy result when less vitamin intkae result, wher hypervitaminosis result in case of excess intake
vitamines could be classifeid into two groups
water-soulble vtiamines
Fat-soulbule vitamine
water-soluble vitamines includes
B1 --- Thiamine
B2 --- Riboflavin
B3 --- Niacin
B6 --- Pyridoxin
B12 --- Cobalamin
C --- Ascorbic acid
Folat
biotin
Pantothenic acid
Fat- soluble vitamins
A
D
Water soluble vitamins have little storage, most excess of water soluble vitamins are excreted in urine in contrast, excess of fat soluble vitamins may be toxic , & because of this it should has a store. when storage is already saturated, any excess will be toxic
-*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*
Vitamin D
Vitamin D (has a hormnal effects) precursor in the skin is 7-dehydrocholestrol (in subcutaneous fat), when ultraviolet light reaches the 7-dehydrocholestrol in subcutaneous fat, 7-dehydrocholestrol is activated
activated 7-dehydrocholestrol migrates to the liver then to the kidney, where the activation process is completed & the compound becomes vitamin D.
__*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_*_ *_*
Vitamin A
its a very important vitamin, & present into the body in three forms, retinol, retinoic acid & retinal
Retinoal is the storable form of vitamin A & its the father of vitamin A ; because it could be converted to the other form ; thats mean any difeincy in retinoal will lead consequently to the definicy in retinal & retinocic acid
retinoal is a hormone , working in bone tissue in growth, sexual function & immune system
Vitamin have two source, animal source & plant source
beta-cartene is a plant source of vitamin A , & is partially convereted into our bodies into retinoal ; but remmber that not all beta-cartene could be convereted into our bodies into retional (note retinoal present in animal food) beta- cartene is antioxident
Retinoic acid is used reepitheliazation ,also used in the onitments to treat trace because retinoic acid encourgae reepilization
Retinal is present in the retina & help to see in darkness
Retinol deficinecy can cause
Immunodeficiency in childeren
imapried growth in chlideren
sexual impotency in childeren
retinal & retinoic acid definicy because retinol is the father of vitamin A as we said