Vitamina B12 per 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.

F Effetto La ricerca indica che è improbabile che sia efficace per questo utilizzo.

Basato su 13 studi con 8,121 partecipanti totali. I risultati sono contrastanti tra gli studi.

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In sintesi

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 Effetto: None None

Retrospective cohort n=2851

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

Dose: None vs: Placebo Effetto: 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 Effetto: 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 Effetto: 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 Effetto: 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 Effetto: None 0.001

Key Statistics

Studi

8121

Partecipanti

↔

Mixed

Grado

Referenced Papers

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

Journal of cosmetic … 2025 4 citazioni

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 citazioni

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 citazioni

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

Dermatology practical & … 2023 4 citazioni

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

Journal of cosmetic … 2022 22 citazioni

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

Turkish journal of … 2022 8 citazioni

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

Journal of cosmetic … 2019 25 citazioni

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

Journal of drugs … 2016 56 citazioni

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

Dermatology research and … 2016 26 citazioni

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

Acta dermatovenerologica Croatica … 2016 6 citazioni

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 citazioni

Management of hair loss in women. Review

Dermatologic clinics 1993 38 citazioni

Dosage & Usage

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

Dosaggi di uso comune

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

Limite massimo: No established UL

Dosaggi studiati nella ricerca

Dosaggio	Durata	Effetto	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

Momento migliore per l'assunzione: With meals; sublingual form can be taken any time

Safety & Side Effects

Effetti collaterali segnalati

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

Interazioni note

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

Livello di assunzione massimo tollerabile: No established UL

Consultare sempre il proprio medico prima di iniziare qualsiasi integratore.Consultate sempre il vostro medico prima di iniziare qualsiasi integratore.

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.

Altri ingredienti per Telogen effluvium

Minoxidil A Olio di semi neri A Viviscal A Ferro B Cheratina B Acidi grassi Omega-3 B

Vitamina B12 per altre condizioni

Perdita di capelli da carenza nutrizionale F

Verdetto rapido

Basato su 13 studi con 8,121 partecipanti totali. I risultati sono contrastanti tra gli studi.

Evidence Strength10%

Low confidence

Analisi degli studi

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

Confronta le alternative

Scoprite come si confrontano altri ingredienti per questa condizione.

Visualizza tutti gli ingredienti per Telogen effluvium

Approfondimenti

References

[1] Ömer Karakoyun et al.. J Cosmet Dermatol. 2025. Retrospective Review of 2851 Female Patients With Telogen Effluvium: A Single-Center Experience. doi:10.1111/jocd.70037 PubMed
[2] Namrata Chhabra et al.. Int J Trichology. 2025. Telogen Effluvium Following Coronavirus Disease-2019 Infection: A Retrospective Study of 113 Cases. doi:10.4103/ijt.ijt_38_22 PubMed
[3] Irem Nur Durusu Turkoglu et al.. J Cosmet Dermatol. 2024. A comprehensive investigation of biochemical status in patients with telogen effluvium: Analysis of Hb, ferritin, vitamin B12, vitamin D, thyroid … doi:10.1111/jocd.16512 PubMed
[4] Leyla Bilik et al.. North Clin Istanb. 2024. Evaluation of the relationship of digital phototrichogram findings of patients with diffuse hair loss with blood TSH, ferritin and vitamin … doi:10.14744/nci.2023.33269 PubMed
[5] Hakan Arslan et al.. Dermatol Pract Concept. 2023. Micronutrient Deficiencies and Digital Computerized Phototrichogram Analysis in Telogen Effluvium: a Retrospective Correlation Study in a Tertiary Medical Center. doi:10.5826/dpc.1303a202 PubMed
[6] Ahu Yorulmaz et al.. J Cosmet Dermatol. 2022. Telogen effluvium in daily practice: Patient characteristics, laboratory parameters, and treatment modalities of 3028 patients with telogen effluvium. doi:10.1111/jocd.14413 PubMed
[7] Ümran Öner et al.. Turk J Med Sci. 2022. Nonscarring scalp alopecia: Which laboratory analysis should we perform on whom? doi:10.3906/sag-2106-28 PubMed
[8] Kavita Poonia et al.. J Cosmet Dermatol. 2019. NonScarring Diffuse Hair Loss in Women: a Clinico-Etiological Study from tertiary care center in North-West India. doi:10.1111/jocd.12559 PubMed
[9] Evelyn J Cheung et al.. J Drugs Dermatol. 2016. Vitamin and Mineral Deficiencies in Patients With Telogen Effluvium: A Retrospective Cross-Sectional Study. PubMed
[10] Kirti Deo et al.. Dermatol Res Pract. 2016. Clinicoepidemiological Observational Study of Acquired Alopecias in Females Correlating with Anemia and Thyroid Function. doi:10.1155/2016/6279108 PubMed
[11] Jana Zímová et al.. Acta Dermatovenerol Croat. 2016. Trichotillomania: Bizzare Patern of Hair Loss at 11-Year-old Girl. PubMed
[12] C Durusoy et al.. Clin Exp Dermatol. 2009. The role of psychological factors and serum zinc, folate and vitamin B12 levels in the aetiology of trichodynia: a case-control … doi:10.1111/j.1365-2230.2008.03165.x PubMed
[13] D H Rushton. Dermatol Clin. 1993. Management of hair loss in women. PubMed

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