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Vitamin A
Recommended Daily Intake
| 3,000 IU for men |
2,333 IU for women |
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Food Sources
Liver
Fish
Egg yolk
Fortified dairy products
Problems Associated with Deficiencies
Night blindness
Impaired vision
Reduced growth in children
Dry skin and eyes
Lowered resistance to infection
Functions/Potential Benefits at Recommended Levels
Helps form and maintain healthy skin, eyes, teeth, gums, hair, mucous membranes and glands
Necessary for night and color vision
Important for resisting infectious diseases
Important for normal growth in children
Involved in fat metabolism
Potential Benefits Under Investigation
May help reduce the recurrence of some types of skin cancer
It has been theorized that vitamin A may be associated with a decreased risk of lung cancer
Special Considerations/Possible Adverse Effects with Excess Intake
Tolerable Upper Intake Level (UL) is 10 000 IU/day
Doses in excess of 8,000 IU a day taken by pregnant women may cause an increased risk in birth defects
* Information in this chart is not intended to provide a complete review on any topic.
** The information in this chart is in reference to healthy adults only, not to children or pregnant and lactating women. |
Vitamins
