Vitamin A 用于 Pediatric Immune Support

Q: Does Vitamin A help with Pediatric Immune Support?

Based on 10 studies with 5,000 participants, there is moderate evidence from clinical studies that Vitamin A may support Pediatric Immune Support management. Our evidence grade is B (Good Evidence).

Q: How much Vitamin A should I take for Pediatric Immune Support?

Studies have used various dosages. A commonly studied range is 700-900 mcg RAE/day. Always consult your healthcare provider before starting any supplement regimen.

Q: Are there side effects of Vitamin A?

Reported side effects may include Hepatotoxicity at chronic high doses, Birth defects (teratogenic at high doses during pregnancy), Nausea and headache, Bone density reduction with long-term excess. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

Q: How strong is the evidence for Vitamin A and Pediatric Immune Support?

We rate the evidence as Grade B (Good Evidence). This rating is based on 10 peer-reviewed studies with 5,000 total participants. The overall direction of effect is positive.

Vitamin A supplementation in deficient children may significantly reduce morbidity and mortality from measles and diarrheal disease. No nutritional deficiency is more consistently associated with increased infectious disease susceptibility than vitamin A deficiency.

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结论

Key Study Findings

Review n=26282 988 weeks

Inadequacy of Immune Health Nutrients: Intakes in US Adults, the 2005-2016 NHANES.

Dose: 45% vs: None Outcome: None 效果: None None

研究人群: None

Review

Diet and nutritional factors in inflammatory bowel diseases.

Dose: None vs: None Outcome: None 效果: None None

研究人群: IBD patients (diet and nutrition)

Observational Study n=61 260 weeks

Vitamin and zinc status pretreatment and posttreatment in patients with inflammatory bowel disease.

Dose: None vs: None Outcome: Vitamin and zinc status in IBD patients 效果: None None

研究人群: Patients with inflammatory bowel disease

Review

Influence of mineral and vitamin supplements on pregnancy outcome.

Dose: None vs: None Outcome: Pregnancy outcome (birth weight, preeclampsia, NTD) 效果: None None

研究人群: Pregnant women

Review

Cod liver oil, young children, and upper respiratory tract infections.

Dose: None vs: None Outcome: vitamin D levels 效果: None None

研究人群: children

Randomized Controlled Trial n=584 52 weeks Double-blind

Interaction of zinc or vitamin A supplementation and specific parasite infections on Mexican infants' growth: …

Dose: Zinc 20mg/day; VitA 20000-45000 IU every 2 months vs: Placebo Outcome: Interaction of zinc or vitamin A supplementation and … 效果: None p<0.05

研究人群: None

Key Statistics

研究数量

5000

受试者

↑

Positive

等级

Referenced Papers

Inadequacy of Immune Health Nutrients: Intakes in US Adults, the 2005-2016 NHANES. Review

Nutrients 2020 75 次引用

Diet and nutritional factors in inflammatory bowel diseases. Review

World journal of … 2016 238 次引用

Vitamin and zinc status pretreatment and posttreatment in patients with inflammatory bowel disease. Other

Journal of pediatric … 2014 38 次引用

Influence of mineral and vitamin supplements on pregnancy outcome. Review

European journal of … 2012 225 次引用

Cod liver oil, young children, and upper respiratory tract infections. Review

Journal of the … 2010 11 次引用

Interaction of zinc or vitamin A supplementation and specific parasite infections on Mexican infants' growth: a randomized clinical trial. RCT

European journal of … 2009 24 次引用

The immune system: a target for functional foods? Review

The British journal … 2002 358 次引用

Chemoprevention of bladder cancer. Review

The Urologic clinics … 2002 20 次引用

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

常用剂量

general:: 700-900 mcg RAE/day
immunesupport:: 900 mcg RAE/day

上限： 3,000 mcg RAE/day (preformed vitamin A)

研究中使用的剂量

剂量	持续时间	效果	N
45%	988 weeks	Positive	26282
None	--	Mixed	--
None	260 weeks	Positive	61
None	--	Positive	--
None	--	Mixed	--
Zinc 20mg/day; VitA 20000-45000 IU every 2 months	52 weeks	Mixed	584
Probiotics, prebiotics, fatty acids, vitamins	--	Positive	--
Various nutrients (selenium, vitamins, green tea)	--	Positive	--

最佳服用时间： With meals containing fat

Safety & Side Effects

已报告的副作用

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

已知相互作用

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

可耐受最高摄入量： 3,000 mcg RAE/day (preformed vitamin A)

在开始服用任何补充剂之前，请务必咨询您的医疗保健提供者。

Frequently Asked Questions

Does Vitamin A help with Pediatric Immune Support?

Based on 10 studies with 5,000 participants, there is moderate evidence from clinical studies that Vitamin A may support Pediatric Immune Support management. Our evidence grade is B (Good Evidence).

How much Vitamin A should I take for Pediatric Immune Support?

Studies have used various dosages. A commonly studied range is 700-900 mcg RAE/day. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of Vitamin A?

Reported side effects may include Hepatotoxicity at chronic high doses, Birth defects (teratogenic at high doses during pregnancy), Nausea and headache, Bone density reduction with long-term excess. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for Vitamin A and Pediatric Immune Support?

We rate the evidence as Grade B (Good Evidence). This rating is based on 10 peer-reviewed studies with 5,000 total participants. The overall direction of effect is positive.

Related Evidence

其他成分用于 Pediatric Immune Support

Iron C

快速结论

Evidence Strength72%

High confidence

研究分析

RCT (1)Meta (0)Other (9)

对比替代方案

查看其他成分针对该健康状况的对比结果。

查看所有成分用于 Pediatric Immune Support

了解更多

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