Vitamine B12 pour Telogen Effluvium

Q: Does Vitamine B12 help with Telogen Effluvium?

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

Q: How much Vitamine 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 Vitamine 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 Vitamine 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.

Basé sur 13 études avec 8,121 participants au total. Les résultats sont mitigés entre les études.

𝕏 LinkedIn

<\/script>\n

`; }, get iframeSnippet() { const domain = 'haircited.com'; const params = 'ingredient\u003Dvitamin\u002Db12\u0026condition\u003Dtelogen\u002Deffluvium'; return ``; }, get activeSnippet() { return this.method === 'script' ? this.scriptSnippet : this.iframeSnippet; }, copySnippet() { navigator.clipboard.writeText(this.activeSnippet).then(() => { this.copied = true; setTimeout(() => { this.copied = false; }, 2000); }); } }" @keydown.escape.window="open = false" @click.outside="open = false">

Embed This Widget

Style

Widget powered by . Free, no account required.

En conclusion

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 Effet: None None

Retrospective cohort n=2851

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

Dose: None vs: Placebo Effet: 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 Effet: 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 Effet: 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 Effet: 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 Effet: None 0.001

Key Statistics

Études

8121

Participants

↔

Mixed

Note

Referenced Papers

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

Journal of cosmetic … 2025 4 citations

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 citations

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 citations

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

Dermatology practical & … 2023 4 citations

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

Journal of cosmetic … 2022 22 citations

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

Turkish journal of … 2022 8 citations

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

Journal of cosmetic … 2019 25 citations

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

Journal of drugs … 2016 56 citations

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

Dermatology research and … 2016 26 citations

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

Acta dermatovenerologica Croatica … 2016 6 citations

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 citations

Management of hair loss in women. Review

Dermatologic clinics 1993 38 citations

Dosage & Usage

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

Posologies couramment utilisées

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

Limite supérieure : No established UL

Posologies étudiées dans la recherche

Posologie	Durée	Effet	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

Moment optimal de prise : With meals; sublingual form can be taken any time

Safety & Side Effects

Effets indésirables signalés

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

Interactions connues

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

Apport maximal tolérable : No established UL

Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.

Frequently Asked Questions

Does Vitamine B12 help with Telogen Effluvium?

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

How much Vitamine 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 Vitamine 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 Vitamine 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

Autres ingrédients pour Telogen Effluvium

Minoxidil A Huile de nigelle A Viviscal A Fer B Kératine B Acides gras oméga-3 B

Vitamine B12 pour d'autres pathologies

Perte Capillaire par Carence Nutritionnelle F

Verdict rapide

Basé sur 13 études avec 8,121 participants au total. Les résultats sont mitigés entre les études.

Evidence Strength10%

Low confidence

Synthèse des études

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

Comparer les alternatives

Découvrez comment d'autres ingrédients se comparent pour cette condition.Découvrez comment d'autres ingrédients se comparent pour cette pathologie.

Voir tous les ingrédients pour Telogen Effluvium

En savoir plus

Avertissement FDA: Ces déclarations n'ont pas été évaluées par la Food and Drug Administration. Les produits et informations sur ce site ne sont pas destinés à diagnostiquer, traiter, guérir ou prévenir quelque maladie que ce soit. Les notes de preuve présentées sont basées sur notre analyse de la recherche publiée et évaluée par des pairs et ne constituent pas un avis médical. Consultez toujours votre professionnel de santé avant de commencer tout régime de compléments alimentaires.