Vitamin A USP

Also known as: retinol, retinyl palmitate, beta-carotene, retinyl acetate

Fat-soluble vitamin essential for vision, immune function, and cell growth. Available as preformed retinol (from animal sources) and provitamin A carotenoids (from plants).

900mcg RAERDARecommended Dietary Allowance — the daily intake sufficient for 97-98% of healthy adults. Set by the National Institutes of Health.

3000mcgUpper LimitTolerable Upper Intake Level (UL) — the maximum daily dose unlikely to cause adverse health effects. Exceeding this consistently may increase toxicity risk.

100ProductsNumber of supplements in our database that contain this ingredient.

2Health ClaimsNumber of researched health benefits associated with this ingredient, rated by evidence strength (strong/moderate/weak).

3Side EffectsNumber of documented side effects from clinical literature and adverse event reports.

Health Claims & Evidence

strongSupports vision health

Essential for rhodopsin production in the retina. Deficiency causes night blindness — one of the earliest recognized nutritional deficiencies.

103 studies on PubMed

Related studies:Automatically retrieved from PubMed based on keyword matching. Some may not directly address the specific claim above.Vitamin A. (2012) · PMID 31643494 Abetalipoproteinemia. (1993) · PMID 30358967 Antioxidant vitamin and mineral supplements for slowing the progression of age-related macular degeneration.Cochrane Database Syst Rev (2023) · PMID 37702300

strongSupports immune function

Critical role in maintaining mucosal barriers and immune cell function.

461 studies on PubMed

Related studies:Automatically retrieved from PubMed based on keyword matching. Some may not directly address the specific claim above.Mechanisms of hepatic stellate cell activation.Nat Rev Gastroenterol Hepatol (2017) · PMID 28487545 The Role of Vitamins and Minerals in Hair Loss: A Review.Dermatol Ther (Heidelb) (2019) · PMID 30547302 Retinoic Acid and Its Derivatives in Skin.Cells (2020) · PMID 33322246

Known Side Effects

nausea at high doses
liver damage with chronic excess
birth defects at very high doses

Drug Interactions

orlistat
retinoids
warfarin

Always consult your healthcare provider before combining supplements with medications.

Health Claims & Evidence

Known Side Effects

Drug Interactions

Products Containing Vitamin A USP (100)