What is the recommended dosage for Vitamin A?

General: 700-900 mcg RAE/day; Immune Support: 900 mcg RAE/day

What are the side effects of Vitamin A?

Potential side effects include: Hepatotoxicity at chronic high doses, Birth defects (teratogenic at high doses during pregnancy), Nausea and headache, Bone density reduction with long-term excess.

What is vitamin A and how does it support immune function?

Vitamin A is a fat-soluble vitamin essential for maintaining mucosal barriers (skin, respiratory tract, gut lining) and supporting the development and function of immune cells including T-cells and B-cells. It is sometimes called the 'anti-infective vitamin.'

What dosage of vitamin A has been studied for immune health?

The recommended dietary allowance for adults is 700–900 mcg RAE per day. Clinical studies for immune outcomes have used doses up to 3,000 mcg RAE per day. The Tolerable Upper Intake Level is 3,000 mcg RAE per day for adults due to toxicity risk.

What are the potential side effects of vitamin A supplementation?

Excess preformed vitamin A (retinol) can cause nausea, headache, liver damage, and birth defects. Chronic intake above the upper limit is toxic. Beta-carotene (provitamin A) is generally safer but may increase lung cancer risk in smokers at high doses.

Vitamin A
Vitamin A

vitamin

También conocido como: Retinol, Retinyl Palmitate, Beta-Carotene (provitamin A)

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About

Vitamin A supports mucosal barrier integrity in the respiratory and gastrointestinal tracts and regulates cell-mediated immunity, cytokine production, and lymphocyte trafficking to mucosal surfaces. Known as the 'anti-infective vitamin,' deficiency is strongly associated with increased susceptibility to infectious diseases.

How It Works

Supports mucosal barrier integrity in respiratory and GI tracts; regulates cell-mediated immunity, cytokine production, and lymphocyte trafficking to mucosal surfaces.

Evidence For Conditions

Condición	Calificación	Estudios	Participantes
Pediatric Immune Support	B	10	5000	Ver →

Side Effects

Hepatotoxicity at chronic high doses
Birth defects (teratogenic at high doses during pregnancy)
Nausea and headache
Bone density reduction with long-term excess

Drug & Supplement Interactions

Retinoid medications (additive toxicity risk)
Orlistat (reduces absorption of fat-soluble vitamins)
Alcohol (increases hepatotoxicity risk)
Tetracycline antibiotics (increased intracranial pressure risk)

Informe siempre a su profesional de salud sobre todos los suplementos que toma.Siempre informe a su profesional de salud sobre todos los suplementos que toma.

Related Ingredients

Vitamin D Vitamin B6 Vitamin C Vitamin E

Datos rápidos

Dosificación: General: 700-900 mcg RAE/day; Immune_Support: 900 mcg RAE/day
Formas: capsule softgel liquid
Fuentes naturales: Liver, Sweet potatoes, Carrots, Spinach, Kale, Eggs
Límite superior: 3,000 mcg RAE/day (preformed vitamin A)
Mejor momento: With meals containing fat

Resumen de evidencia

Pediatric Immune Support B

Aviso legal FDA: Estas declaraciones no han sido evaluadas por la Food and Drug Administration. Los productos y la información en este sitio web no están destinados a diagnosticar, tratar, curar ni prevenir ninguna enfermedad. Las calificaciones de evidencia presentadas se basan en nuestro análisis de investigación publicada revisada por pares y no constituyen consejo médico. Siempre consulte a su profesional de salud antes de comenzar cualquier régimen de suplementos.