“Vitamin A (vitamin A Palmitate)?”Here!vitamin A, retinyl palmitate
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As a supplement
Talk to your doctor or pharmacist.
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A preformed, fat-soluble form of vitamin A in which retinol is bound to palmitic acid, making it more stable for use in supplements and fortified foods.
Why it’s used
Taken to help maintain normal vitamin A status, which supports vision, immune function, and normal cell growth and differentiation.
What the evidence is for
maintaining normal vision, immune function, and cell growth, particularly in cases of deficiency.
What the evidence says
The NIH Office of Dietary Supplements' vitamin A fact sheet describes well-established roles for vitamin A in vision (especially low-light vision), immune function, and reproduction, with deficiency clearly linked to vision problems and increased infection risk in populations with inadequate intake. In well-nourished populations with adequate dietary intake, additional supplementation has not been shown to provide further benefit, and preformed vitamin A carries a defined upper intake limit due to risks of toxicity at high doses over time.
Dose studied
700–3000 mcg — adult RDA range (700-900 mcg RAE) up to the tolerable upper intake level (3000 mcg) for preformed vitamin A, per NIH ODS.
Context
The adult Recommended Dietary Allowance and tolerable upper intake level for preformed vitamin A are expressed in micrograms of retinol activity equivalents; clinical and toxicity data are drawn from both dietary intake and supplement-dose studies.
Rumors
Preventing the night blindness of vitamin A deficiency, and the corneal damage behind one of the leading causes of preventable blindness in children.
Supports — establishedhealth and safety evidence
Measured as an outcome.
- Vitamin A and Carotenoids Fact Sheet for Health Professionals (Regulatory) · Funding not checked
How much is a reference amount
- 700 mcg RAE a dayfor adults 19 and over, women · Recommended Dietary Allowance
Upper limit 3,000 mcg a day, from food and supplements together and only to preformed vitamin A (retinol and retinyl esters) — provitamin A carotenoids such as beta-carotene have no upper limit at all.
- 900 mcg RAE a dayfor adults 19 and over, men · Recommended Dietary Allowance
Upper limit 3,000 mcg a day, from food and supplements together and only to preformed vitamin A (retinol and retinyl esters) — provitamin A carotenoids such as beta-carotene have no upper limit at all.
The RDA is in retinol activity equivalents, which count carotenoids at a fraction of retinol. The upper limit is in plain mcg and covers PREFORMED vitamin A only — retinol and retinyl esters — because provitamin A carotenoids have no upper limit at all.
Every applicable line is shown because we don’t know which one is yours, and a reference intake is a target for a population, not a threshold for harm.