Vitamina B12 para Telogen Effluvium

Q: Does Vitamina B12 help with Telogen Effluvium?

Based on 13 studies with 8,121 participants, there is insufficient evidence at this time that Vitamina B12 may support Telogen Effluvium management. Our evidence grade is F (Evidence Against).

Q: How much Vitamina B12 should I take for Telogen Effluvium?

Studies have used various dosages. A commonly studied range is 2.4 mcg/day. Always consult your healthcare provider before starting any supplement regimen.

Q: Are there side effects of Vitamina B12?

Reported side effects may include Generally well tolerated even at high doses, Rare allergic reactions (itching, swelling), Mild diarrhea or nausea at very high doses. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

Q: How strong is the evidence for Vitamina B12 and Telogen Effluvium?

We rate the evidence as Grade F (Evidence Against). This rating is based on 13 peer-reviewed studies with 8,121 total participants. The overall direction of effect is mixed.

Baseado em 13 estudos com 8,121 participantes no total. Os resultados são variados entre os estudos.

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Conclusão

Research does not clearly support vitamin B12 supplementation for telogen effluvium — while low B12 is sometimes found in hair loss patients, there is no strong evidence that supplementation helps recovery.

Mixed results across 13 observational studies
Some post-COVID hair loss studies measured B12 levels without finding consistent patterns
No RCTs testing B12 supplementation for telogen effluvium
Only worth supplementing if a blood test confirms a B12 deficiency

Key Study Findings

retrospective observational n=113

Telogen Effluvium Following Coronavirus Disease-2019 Infection: A Retrospective Study of 113 Cases.

Dose: None vs: Placebo Efeito: None None

Retrospective cohort n=2851

Retrospective Review of 2851 Female Patients With Telogen Effluvium: A Single-Center Experience.

Dose: None vs: Placebo Efeito: Ferritin low in 46.5% of patients; iron deficiency in 29.5% p<0.05

Cross-Sectional Study n=108

Evaluation of the relationship of digital phototrichogram findings of patients with diffuse hair loss with …

Dose: None vs: Placebo Efeito: None 0.05

case-control study n=180

A comprehensive investigation of biochemical status in patients with telogen effluvium: Analysis of Hb, ferritin, …

Dose: not applicable vs: Placebo Efeito: None None

Case-control n=973

Micronutrient Deficiencies and Digital Computerized Phototrichogram Analysis in Telogen Effluvium: a Retrospective Correlation Study in …

Dose: None vs: Placebo Efeito: r=0.417 (HGB and AHR in females) p=0.008

retrospective cross-sectional study n=467

Nonscarring scalp alopecia: Which laboratory analysis should we perform on whom?

Dose: not applicable vs: Placebo Efeito: None 0.001

Key Statistics

Estudos

8121

Participantes

↔

Mixed

Nota

Referenced Papers

Retrospective Review of 2851 Female Patients With Telogen Effluvium: A Single-Center Experience. Other

Journal of cosmetic … 2025 4 citações

Telogen Effluvium Following Coronavirus Disease-2019 Infection: A Retrospective Study of 113 Cases. Other

International journal of … 2025

A comprehensive investigation of biochemical status in patients with telogen effluvium: Analysis of Hb, ferritin, vitamin B12, vitamin D, thyroid … Other

Journal of cosmetic … 2024 7 citações

Evaluation of the relationship of digital phototrichogram findings of patients with diffuse hair loss with blood TSH, ferritin and vitamin … Other

Northern clinics of … 2024 1 citações

Micronutrient Deficiencies and Digital Computerized Phototrichogram Analysis in Telogen Effluvium: a Retrospective Correlation Study in a Tertiary Medical Center. Other

Dermatology practical & … 2023 4 citações

Telogen effluvium in daily practice: Patient characteristics, laboratory parameters, and treatment modalities of 3028 patients with telogen effluvium. Other

Journal of cosmetic … 2022 22 citações

Nonscarring scalp alopecia: Which laboratory analysis should we perform on whom? Other

Turkish journal of … 2022 8 citações

NonScarring Diffuse Hair Loss in Women: a Clinico-Etiological Study from tertiary care center in North-West India. Observational

Journal of cosmetic … 2019 25 citações

Vitamin and Mineral Deficiencies in Patients With Telogen Effluvium: A Retrospective Cross-Sectional Study. Other

Journal of drugs … 2016 56 citações

Clinicoepidemiological Observational Study of Acquired Alopecias in Females Correlating with Anemia and Thyroid Function. Other

Dermatology research and … 2016 26 citações

Trichotillomania: Bizzare Patern of Hair Loss at 11-Year-old Girl. Case Report

Acta dermatovenerologica Croatica … 2016 6 citações

The role of psychological factors and serum zinc, folate and vitamin B12 levels in the aetiology of trichodynia: a case-control … Other

Clinical and experimental … 2009 34 citações

Management of hair loss in women. Review

Dermatologic clinics 1993 38 citações

Dosage & Usage

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

Dosagens Comumente Utilizadas

general:: 2.4 mcg/day
deficiency:: 1,000-2,000 mcg/day

Limite superior: No established UL

Dosagens Estudadas em Pesquisas

Dosagem	Duração	Efeito	N
None	--	Neutral	113
None	--	Neutral	2851
None	--	Mixed	108
not applicable	--	Mixed	180
None	--	Positive	973
not applicable	--	Mixed	467
standard replacement doses	--	Neutral	3028
None	--	Neutral	100

Melhor horário: With meals; sublingual form can be taken any time

Safety & Side Effects

Efeitos Colaterais Relatados

⚠ Generally well tolerated even at high doses
⚠ Rare allergic reactions (itching, swelling)
⚠ Mild diarrhea or nausea at very high doses

Interações Conhecidas

● Metformin (reduces B12 absorption by 10-30%)
● Proton pump inhibitors and H2 blockers (reduce B12 absorption)
● Colchicine (may reduce B12 absorption)

Ingestão máxima tolerável: No established UL

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 Vitamina B12 help with Telogen Effluvium?

Based on 13 studies with 8,121 participants, there is insufficient evidence at this time that Vitamina B12 may support Telogen Effluvium management. Our evidence grade is F (Evidence Against).

How much Vitamina B12 should I take for Telogen Effluvium?

Studies have used various dosages. A commonly studied range is 2.4 mcg/day. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of Vitamina B12?

Reported side effects may include Generally well tolerated even at high doses, Rare allergic reactions (itching, swelling), Mild diarrhea or nausea at very 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 Vitamina B12 and Telogen Effluvium?

We rate the evidence as Grade F (Evidence Against). This rating is based on 13 peer-reviewed studies with 8,121 total participants. The overall direction of effect is mixed.

Related Evidence

Outros ingredientes para Telogen Effluvium

Minoxidil A Óleo de semente preta A Viviscal A Ferro B Keratin B Ácidos graxos ômega-3 B

Vitamina B12 para outras condições

Perda Capilar por Deficiência Nutricional F

Veredito Rápido

Baseado em 13 estudos com 8,121 participantes no total. Os resultados são variados entre os estudos.

Evidence Strength10%

Low confidence

Detalhamento dos Estudos

RCT (0)Meta (0)Other (13)

Comparar Alternativas

Veja como outros ingredientes se comparam para esta condição.

Ver todos os ingredientes para Telogen Effluvium

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.