Vitamin A (as Acetate and 11% Beta Carotene) — answers to Vitamin A
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A blended vitamin A source combining retinyl acetate, a synthetic preformed vitamin A compound, with a smaller portion (about 11 percent) supplied as beta-carotene, a plant-derived pigment the body can convert into vitamin A as needed.
Why it’s used
Taken to meet vitamin A requirements, which support vision, immune function, and cell growth.
What the evidence is for
preventing and correcting vitamin A deficiency.
What the evidence says
NIH ODS confirms vitamin A is essential and that deficiency, though rare in well-nourished populations, can affect vision and immune function. The preformed (retinyl acetate) portion is absorbed directly and contributes to intake more predictably than beta-carotene, whose conversion efficiency varies between people. Evidence for benefits beyond correcting or preventing deficiency, in people who are not deficient, is limited.
Dose studied
900–3000 mcg — adult RDA (mcg RAE) up to the tolerable upper intake level, per NIH ODS.
Context
NIH ODS expresses requirements and upper limits in micrograms of Retinol Activity Equivalents (mcg RAE), a unit that accounts for the different conversion rates of preformed vitamin A and beta-carotene; high-dose beta-carotene supplementation has also been studied specifically in smokers, where large trials found an increased lung cancer signal rather than a benefit.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.