March 10, 2025
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Updated the measles section with newer research.
August 12, 2022
Updated the “What are some effects of vitamin A on health?” section to clarify that supplements for age-related macular degeneration help reduce the risk of disease progression.
June 15, 2022
Updated the section on age-related macular degeneration.
May 11, 2022
This fact sheet was comprehensively reviewed and extensively revised.
January 14, 2021
Linked to the new edition of the Dietary Guidelines for Americans and updated the associated text.
February 14, 2020
Changed Recommended Amounts and Upper Limits from International Units to Micrograms of Retinol Activity Equivalents.
December 10, 2019
Changed text to clarify that the upper limits are "daily" amounts.
July 11, 2019
Updated the link to USDA’s FoodData Central.
