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Vitamine B12 pour Perte Capillaire par Carence Nutritionnelle

F

Basé sur 20 études avec 8,355 participants au total. Les résultats sont mitigés entre les études.

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F

En conclusion

Research shows mixed results for vitamin B12 and hair loss — while deficiency may contribute to hair thinning, supplementation is unlikely to help unless you have a confirmed B12 deficiency.

  • Mixed results across 20 studies — no consistent benefit from supplementation
  • Some studies find lower B12 levels in hair loss patients, others do not
  • No large-scale RCTs testing B12 supplementation specifically for hair regrowth
  • Supplementation may only help if a genuine B12 deficiency is present

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
Review
Medical Marijuana and Treatment Personalization: The Role of Genetics and Epigenetics in Response to THC …
Dose: None vs: None Outcome: None Effet: None None

Population: Review of pharmacogenomics of THC and CBD

Key Statistics

19

Études

8130

Participants

Mixed

F

Note

Referenced Papers

Frontiers in pharmacology 2022 31 citations
Journal of pain … 2020 56 citations
American journal of … 2017 104 citations
Acta dermatovenerologica Croatica … 2016 6 citations
Prostaglandins, leukotrienes, and … 2015 40 citations
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 --
not applicable -- Mixed 180
None -- Mixed 108
None -- Positive 973
None -- Neutral --
300 mg single dose -- Mixed 9

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 Perte Capillaire par Carence Nutritionnelle?
Based on 19 studies with 8,130 participants, there is insufficient evidence at this time that Vitamine B12 may support Perte Capillaire par Carence Nutritionnelle management. Our evidence grade is F (Evidence Against).
How much Vitamine B12 should I take for Perte Capillaire par Carence Nutritionnelle?
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 Perte Capillaire par Carence Nutritionnelle?
We rate the evidence as Grade F (Evidence Against). This rating is based on 19 peer-reviewed studies with 8,130 total participants. The overall direction of effect is mixed.

Related Evidence

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Vitamine B12 pour d'autres pathologies

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.