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

Também conhecido 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

Condição	Nota	Estudos	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 sempre o seu profissional de saúde sobre todos os suplementos que você toma.Sempre informe seu profissional de saúde sobre todos os suplementos que você toma.

Related Ingredients

Vitamin D Vitamin B6 Vitamin C Vitamin E

Dados Rápidos

Dosagem: General: 700-900 mcg RAE/day; Immune_Support: 900 mcg RAE/day
Formas: capsule softgel liquid
Fontes Naturais: Liver, Sweet potatoes, Carrots, Spinach, Kale, Eggs
Limite Superior: 3,000 mcg RAE/day (preformed vitamin A)
Melhor Horário: With meals containing fat

Resumo das Evidências

Pediatric Immune Support B

Aviso Legal da FDA: Estas declarações não foram avaliadas pela Food and Drug Administration. Os produtos e informações neste site não se destinam a diagnosticar, tratar, curar ou prevenir qualquer doença. As notas de evidência apresentadas são baseadas em nossa análise de pesquisas revisadas por pares publicadas e não constituem aconselhamento médico. Sempre consulte seu profissional de saúde antes de iniciar qualquer regime de suplementação.