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11 kwi 2024 · Usual Adult Dose for Vitamin A Deficiency Initial dose: 100,000 Units intramuscularly once a day for 3 days Maintenance dose: 50,000 Units intramuscularly once a day for 2 weeks
For example, the RDA of 900 mcg RAE for adolescent and adult men is equivalent to 3,000 IU if the food or supplement source is preformed vitamin A (retinol) or if the supplement source is beta-carotene.
The recommended daily amount of vitamin A is 900 micrograms (mcg) for adult men and 700 mcg for adult women. What the research says. Research on oral vitamin A for specific conditions shows: Acne. Large doses of oral vitamin A supplements don't appear to affect acne. Age-related macular degeneration.
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.
The median intake of vitamin A ranges from 744 to 811 μg RAE/ day for men and 530 to 716 μg RAE/day for women. Using μg RAE, approximately 26 and 34 percent of vitamin A activity consumed by men and women, respectively, is provided from provitamin A carotenoids.
Although the amount of vitamin A (retinol) required for these functions, in the range of μg/day (1), is a trace component of the diet, its biological impact is wide ranging. This chapter focuses on the practical use of diet in retinoid research from two perspectives: human diets, and animal (rodent) diets.
Vitamin A is a fat-soluble vitamin that is essential for humans. Just like other vitamins, it needs to be provided with food (or supplements when required) in recommended amounts, as its deficiency is associated with serious health problems. There are two forms of vitamin A available in food:
