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Vitamin A Pediatric Dosage. Infants up to 6 months need 400 micrograms of vitamin A per day, while infants between ages 7 months and 12 months require 500 micrograms per day.For children aged 1 to 2 years, the recommended daily allowance, or RDA, for vitamin A is 300 micrograms.Children from the ages of 4 to 8 should consume 400 micrograms each day, whereas children from 9 to 13 need 600 micrograms daily.The RDA for boys aged 14 years to 18 years is 900 micrograms, whereas for girls in the same age group, the RDA is 700 micrograms.hildren from the ages of 4 to 8 should consume 400 micrograms each day, whereas children from 9 to 13 need 600 micrograms daily. The RDA for boys aged 14 years to 18 years is 900 micrograms, whereas for girls in the same age group, the RDA is 700 micrograms.
Vitamin A is fat-soluble, meaning too much vitamin A can lead to liver damage, headaches, nausea, and even death. The upper limit is 3,000 mcg RAE (âretinol activity equivalentsâ) per day.