Vitamina B12 para Pérdida Capilar por Deficiencia Nutricional

Q: Does Vitamina B12 help with Pérdida Capilar por Deficiencia Nutricional?

Based on 19 studies with 8,130 participants, there is insufficient evidence at this time that Vitamina B12 may support Pérdida Capilar por Deficiencia Nutricional management. Our evidence grade is F (Evidence Against).

Q: How much Vitamina B12 should I take for Pérdida Capilar por Deficiencia Nutricional?

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 Pérdida Capilar por Deficiencia Nutricional?

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.

Basado en 20 estudios con 8,355 participantes en total. Los resultados son variados entre los estudios.

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Conclusión

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 Efecto: None None

Retrospective cohort n=2851

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

Dose: None vs: Placebo Efecto: 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 Efecto: None None

Población: Review of pharmacogenomics of THC and CBD

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 Efecto: None None

Cross-Sectional Study n=108

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

Dose: None vs: Placebo Efecto: None 0.05

Case-control n=973

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

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

Key Statistics

Estudios

8130

Participantes

↔

Mixed

Calificación

Referenced Papers

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

Journal of cosmetic … 2025 4 citas

Medical Marijuana and Treatment Personalization: The Role of Genetics and Epigenetics in Response to THC and CBD. Review

Genes 2025 1 citas

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 citas

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 citas

Quantity of Melatonin and CBD in Melatonin Gummies Sold in the US. Other

JAMA 2023 49 citas

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

Dermatology practical & … 2023 4 citas

Effects of Cannabidiol on Exercise Physiology and Bioenergetics: A Randomised Controlled Pilot Trial. Other

Sports medicine - … 2022 34 citas

Differentiating Cannabis Products: Drugs, Food, and Supplements. Review

Frontiers in pharmacology 2022 31 citas

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

Journal of cosmetic … 2022 22 citas

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

Turkish journal of … 2022 8 citas

CBD Effects on TRPV1 Signaling Pathways in Cultured DRG Neurons. Other

Journal of pain … 2020 56 citas

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

Journal of cosmetic … 2019 25 citas

The Role of Micronutrients in Alopecia Areata: A Review. Review

American journal of … 2017 104 citas

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

Journal of drugs … 2016 56 citas

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

Dermatology research and … 2016 26 citas

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

Acta dermatovenerologica Croatica … 2016 6 citas

Vitamin B12 and omega-3 fatty acids together regulate lipid metabolism in Wistar rats. Other

Prostaglandins, leukotrienes, and … 2015 40 citas

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 citas

Management of hair loss in women. Review

Dermatologic clinics 1993 38 citas

Dosage & Usage

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

Dosificaciones de uso común

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

Límite superior: No established UL

Dosificaciones estudiadas en la investigación

Dosificación	Duración	Efecto	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

Mejor momento para tomar: With meals; sublingual form can be taken any time

Safety & Side Effects

Efectos secundarios reportados

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

Interacciones conocidas

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

Ingesta máxima tolerable: No established UL

Consulte siempre a su profesional de salud antes de comenzar cualquier suplemento.Siempre consulte a su profesional de salud antes de comenzar cualquier suplemento.

Frequently Asked Questions

Does Vitamina B12 help with Pérdida Capilar por Deficiencia Nutricional?

Based on 19 studies with 8,130 participants, there is insufficient evidence at this time that Vitamina B12 may support Pérdida Capilar por Deficiencia Nutricional management. Our evidence grade is F (Evidence Against).

How much Vitamina B12 should I take for Pérdida Capilar por Deficiencia Nutricional?

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 Pérdida Capilar por Deficiencia Nutricional?

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

Otros ingredientes para Pérdida Capilar por Deficiencia Nutricional

Selenio A Biotin B Vitamin A D L-Cysteine D Folato F

Vitamina B12 para otras condiciones

Telogen Effluvium F

Veredicto rápido

Basado en 20 estudios con 8,355 participantes en total. Los resultados son variados entre los estudios.

Evidence Strength10%

Low confidence

Desglose de estudios

RCT (0)Meta (0)Other (19)

Comparar alternativas

Vea cómo se comparan otros ingredientes para esta condición.

Ver todos los ingredientes para Pérdida Capilar por Deficiencia Nutricional

Más información

Aviso legal FDA: Estas declaraciones no han sido evaluadas por la Food and Drug Administration. Los productos y la información en este sitio web no están destinados a diagnosticar, tratar, curar ni prevenir ninguna enfermedad. Las calificaciones de evidencia presentadas se basan en nuestro análisis de investigación publicada revisada por pares y no constituyen consejo médico. Siempre consulte a su profesional de salud antes de comenzar cualquier régimen de suplementos.