The maximum daily dose relates to only pre-formed vitamin A. Pre-formed vitamin A is possibly unsafe when taken in doses greater than 10,000 units (3,000 mcg) daily. Higher doses might increase the risk of side effects. Long-term use of large amounts might cause serious side effects including mental changes.
Should you use vitamin A everyday?
The recommended daily amount of vitamin A is 900 micrograms (mcg) for adult men and 700 mcg for adult women.
How often can you take vitamin A?
Both deficiency and surplus intake may cause severe side effects. Therefore, while it's crucial to meet the RDA of 700–900 mcg daily for adults, it's also essential not to exceed the daily upper limit of 3,000 mcg.
How much vitamin A is recommended daily?
RDA: The Recommended Dietary Allowance for adults 19 years and older is 900 mcg RAE for men (equivalent to 3,000 IU) and 700 mcg RAE for women (equivalent to 2,333 IU). UL: The Tolerable Upper Intake Level is the maximum daily intake unlikely to cause harmful effects on health.
Who should not take vitamin A?
But, too much preformed vitamin A can cause birth defects in your baby. Pregnant women should avoid supplements that contain more than 1,500 micrograms of RAE. Drug interactions. Vitamin A can interact with certain drugs like blood thinners, bexarotene, retinoids, orlistat, and any drug that can cause liver damage.
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