Vitamin B12 के लिए पोषण संबंधी कमी से बाल झड़ना
F20 अध्ययनों पर आधारित, में कुल 8,355 प्रतिभागियों के साथ। अध्ययनों के बीच परिणाम मिश्रित हैं।
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F
निष्कर्ष
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
बनाम: Placebo
प्रभाव: None
None
Retrospective cohort
n=2851
Retrospective Review of 2851 Female Patients With Telogen Effluvium: A Single-Center Experience.
Dose: None
बनाम: Placebo
प्रभाव: 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
बनाम: None
Outcome: None
प्रभाव: None
None
जनसंख्या: 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
बनाम: Placebo
प्रभाव: None
None
Cross-Sectional Study
n=108
Evaluation of the relationship of digital phototrichogram findings of patients with diffuse hair loss with …
Dose: None
बनाम: Placebo
प्रभाव: None
0.05
Case-control
n=973
Micronutrient Deficiencies and Digital Computerized Phototrichogram Analysis in Telogen Effluvium: a Retrospective Correlation Study in …
Dose: None
बनाम: Placebo
प्रभाव: r=0.417 (HGB and AHR in females)
p=0.008
Key Statistics
19
अध्ययन
8130
प्रतिभागी
↔
Mixed
F
ग्रेड
Referenced Papers
Retrospective Review of 2851 Female Patients With Telogen Effluvium: A Single-Center Experience.
Other
Journal of cosmetic …
2025
4 उद्धरण
Genes
2025
1 उद्धरण
Telogen Effluvium Following Coronavirus Disease-2019 Infection: A Retrospective Study of 113 Cases.
Other
International journal of …
2025
Journal of cosmetic …
2024
7 उद्धरण
Northern clinics of …
2024
1 उद्धरण
JAMA
2023
49 उद्धरण
Dermatology practical & …
2023
4 उद्धरण
Sports medicine - …
2022
34 उद्धरण
Frontiers in pharmacology
2022
31 उद्धरण
Journal of cosmetic …
2022
22 उद्धरण
Turkish journal of …
2022
8 उद्धरण
Journal of pain …
2020
56 उद्धरण
NonScarring Diffuse Hair Loss in Women: a Clinico-Etiological Study from tertiary care center in North-West India.
Observational
Journal of cosmetic …
2019
25 उद्धरण
American journal of …
2017
104 उद्धरण
Journal of drugs …
2016
56 उद्धरण
Dermatology research and …
2016
26 उद्धरण
Acta dermatovenerologica Croatica …
2016
6 उद्धरण
Prostaglandins, leukotrienes, and …
2015
40 उद्धरण
Clinical and experimental …
2009
34 उद्धरण
Dermatologic clinics
1993
38 उद्धरण
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
सामान्य रूप से उपयोग की जाने वाली खुराकें
- general:
- 2.4 mcg/day
- deficiency:
- 1,000-2,000 mcg/day
अधिकतम सीमा: No established UL
अनुसंधान में अध्ययन की गई खुराकें
| खुराक | अवधि | प्रभाव | 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 |
सेवन का सर्वोत्तम समय: With meals; sublingual form can be taken any time
Safety & Side Effects
रिपोर्ट किए गए दुष्प्रभाव
- ⚠ Generally well tolerated even at high doses
- ⚠ Rare allergic reactions (itching, swelling)
- ⚠ Mild diarrhea or nausea at very high doses
ज्ञात अंतःक्रियाएँ
- ● Metformin (reduces B12 absorption by 10-30%)
- ● Proton pump inhibitors and H2 blockers (reduce B12 absorption)
- ● Colchicine (may reduce B12 absorption)
सहनीय अधिकतम सेवन: No established UL
कोई भी सप्लीमेंट शुरू करने से पहले हमेशा अपने स्वास्थ्य सेवा प्रदाता से परामर्श करें।
Frequently Asked Questions
Does Vitamin B12 help with पोषण संबंधी कमी से बाल झड़ना?
Based on 19 studies with 8,130 participants, there is insufficient evidence at this time that Vitamin B12 may support पोषण संबंधी कमी से बाल झड़ना management. Our evidence grade is F (Evidence Against).
How much Vitamin B12 should I take for पोषण संबंधी कमी से बाल झड़ना?
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 Vitamin 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 Vitamin B12 and पोषण संबंधी कमी से बाल झड़ना?
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
इसके लिए अन्य सामग्री पोषण संबंधी कमी से बाल झड़ना
Vitamin B12 अन्य स्वास्थ्य स्थितियों के लिए
FDA अस्वीकरण: इन कथनों का Food and Drug Administration द्वारा मूल्यांकन नहीं किया गया है। इस वेबसाइट पर उत्पादों और जानकारी का उद्देश्य किसी बीमारी का निदान, उपचार, इलाज या रोकथाम नहीं है। प्रस्तुत साक्ष्य ग्रेड प्रकाशित पीयर-रिव्यूड अनुसंधान के हमारे विश्लेषण पर आधारित हैं और चिकित्सा सलाह नहीं हैं। कोई भी सप्लीमेंट शुरू करने से पहले हमेशा अपने स्वास्थ्य सेवा प्रदाता से परामर्श करें।