Vitamin A para Perda Capilar por Deficiência Nutricional

Based on 4 studies with 1 total participants. 3/4 studies show positive effects.

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Conclusão

Based on 4 studies with 1 total participants. 3/4 studies show positive effects.

Key Study Findings

Review

Vitamins A, B, C, and D: A Short Review for the Dermatologist.

Dose: None vs: control Outcome: None Efeito: None None

População: patients with uncombable hair syndrome

Case report n=1 20 weeks

Combined Diet and Supplementation Therapy Resolves Alopecia Areata in a Paediatric Patient: A Case Study.

Dose: Multi-nutrient supplement, zinc sulfate, fish oil with vitamin D; diet rich in vitamins A and D, zin vs: Placebo Efeito: Complete remission within 5 months None

narrative_review

Nutrition and skin: Kids are not just little people.

Dose: None vs: Placebo Efeito: narrative review; discusses role of nutrition from prenatal period on skin immune responses; highlig not_applicable

Review

Retinoids putting the "a" in alopecia.

Dose: None vs: None Outcome: Vitamin A role in alopecia development Efeito: None None

População: Patients with alopecia (theoretical)

Key Statistics

Estudos

Participantes

↑

Positive

Nota

Referenced Papers

Vitamins A, B, C, and D: A Short Review for the Dermatologist. Review

Alternative therapies in … 2021 10 citações

Combined Diet and Supplementation Therapy Resolves Alopecia Areata in a Paediatric Patient: A Case Study. Case Report

Cureus 2020 5 citações

Nutrition and skin: Kids are not just little people. Review

Clinics in dermatology 2016 19 citações

Retinoids putting the "a" in alopecia. Other

The Journal of … 2013 10 citações

Dosage & Usage

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

Dosagens Comumente Utilizadas

general:: 700-900 mcg RAE/day (2,300-3,000 IU)

Limite superior: 3,000 mcg RAE/day (10,000 IU preformed vitamin A)

Dosagens Estudadas em Pesquisas

Dosagem	Duração	Efeito	N
None	--	Positive	--
Multi-nutrient supplement, zinc sulfate, fish oil with vitamin D; diet rich in vitamins A and D, zin	20 weeks	Positive	1
None	--	Positive	--
None	--	Negative	--

Melhor horário: With a fat-containing meal; consult your healthcare provider about appropriate dosage

Safety & Side Effects

Efeitos Colaterais Relatados

⚠ Hair loss at excessive doses (hypervitaminosis A)
⚠ Dry skin and lips
⚠ Headache and nausea at high doses
⚠ Teratogenicity — contraindicated in pregnancy at high doses

Interações Conhecidas

● Retinoid medications (isotretinoin, tretinoin — additive toxicity risk)
● Tetracycline antibiotics (increased intracranial pressure risk)
● Anticoagulants (high-dose vitamin A may increase bleeding risk)
● Hepatotoxic drugs (additive liver stress at high doses)

Ingestão máxima tolerável: 3,000 mcg RAE/day (10,000 IU preformed vitamin A)

Consulte sempre o seu profissional de saúde antes de iniciar qualquer suplemento.Sempre consulte seu profissional de saúde antes de iniciar qualquer suplemento.

Frequently Asked Questions

Does Vitamin A help with Perda Capilar por Deficiência Nutricional?

Based on 4 studies with 1 participants, there is preliminary evidence that needs more research that Vitamin A may support Perda Capilar por Deficiência Nutricional management. Our evidence grade is D (Very Early Research).

How much Vitamin A should I take for Perda Capilar por Deficiência Nutricional?

Studies have used various dosages. A commonly studied range is 700-900 mcg RAE/day (2,300-3,000 IU). Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of Vitamin A?

Reported side effects may include Hair loss at excessive doses (hypervitaminosis A), Dry skin and lips, Headache and nausea at high doses, Teratogenicity — contraindicated in pregnancy at high doses. 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 Perda Capilar por Deficiência Nutricional?

We rate the evidence as Grade D (Very Early Research). This rating is based on 4 peer-reviewed studies with 1 total participants. The overall direction of effect is positive.

Related Evidence

Outros ingredientes para Perda Capilar por Deficiência Nutricional

Selênio A Biotin B L-Cisteína D Vitamina B12 F Folato F

Vitamin A para outras condições

Scalp Inflammation (Folliculitis & Dermatitis) D

Veredito Rápido

Based on 4 studies with 1 total participants. 3/4 studies show positive effects.

Evidence Strength30%

Low confidence

Detalhamento dos Estudos

RCT (0)Meta (0)Other (4)

Comparar Alternativas

Veja como outros ingredientes se comparam para esta condição.

Ver todos os ingredientes para Perda Capilar por Deficiência Nutricional

Saiba Mais

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.