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Vitamin A <Retinol> (Pure) - Coggle Diagram
Vitamin A <Retinol> (Pure)
Sources
Milk
Eggs
Offal
Cheese
Properties
Destroyed by oxygen
Soluble in organic solvents eg acetone
Heat stable, but affected by prolonged high temperatures
Reference Intake
600-700 micrograms for Teens and Adults
700 micrograms for Pregnancy
400-500 micrograms for Children
950 micrograms for Lactation
Deficiency
Delayed growth in children leaving them smaller in height than average for their age
Risk of damage to cells by free radicals, increasing the risk of some cancers, coronary heart disease and strokes
Night blindness, a person will struggle to see in dim light due to a lack of rhodopsin
Functions
Aids the growth and development of children
Beta-carotene acts as a powerful antioxidant that can counteract the damaging effects of free radicals
Helps maintain healthy skin and the mucous membranes of the body eg the eyes
Definitions
Retinol:
Easily absorbed. Stored in the liver.
Beta-carotene
: not easily absorbed. Converted to retinol in the lining of the intestine