维生素 B12 用于休止期脱发

Q: Does 维生素 B12 help with 休止期脱发?

Based on 13 studies with 8,121 participants, there is insufficient evidence at this time that 维生素 B12 may support 休止期脱发 management. Our evidence grade is F (Evidence Against).

Q: How much 维生素 B12 should I take for 休止期脱发?

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 维生素 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 维生素 B12 and 休止期脱发?

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 效果研究表明，该用途可能不太有效。

基于13项研究，共8,121名参与者。各研究结果不一。

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.

结论

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 效果: None None

Retrospective cohort n=2851

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

Dose: None vs: Placebo 效果: 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 效果: 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 效果: 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 效果: 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 效果: None 0.001

Key Statistics

研究数量

8121

受试者

↔

Mixed

等级

Referenced Papers

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

Journal of cosmetic … 2025 4 次引用

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 次引用

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 次引用

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

Dermatology practical & … 2023 4 次引用

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

Journal of cosmetic … 2022 22 次引用

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

Turkish journal of … 2022 8 次引用

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

Journal of cosmetic … 2019 25 次引用

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

Journal of drugs … 2016 56 次引用

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

Dermatology research and … 2016 26 次引用

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

Acta dermatovenerologica Croatica … 2016 6 次引用

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 次引用

Management of hair loss in women. Review

Dermatologic clinics 1993 38 次引用

Dosage & Usage

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

常用剂量

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

上限： No established UL

研究中使用的剂量

剂量	持续时间	效果	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

最佳服用时间： With meals; sublingual form can be taken any time

Safety & Side Effects

已报告的副作用

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

已知相互作用

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

可耐受最高摄入量： No established UL

在开始服用任何补充剂之前，请务必咨询您的医疗保健提供者。

Frequently Asked Questions

Does 维生素 B12 help with 休止期脱发?

Based on 13 studies with 8,121 participants, there is insufficient evidence at this time that 维生素 B12 may support 休止期脱发 management. Our evidence grade is F (Evidence Against).

How much 维生素 B12 should I take for 休止期脱发?

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 维生素 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 维生素 B12 and 休止期脱发?

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.

其他成分用于休止期脱发

米诺地尔（Minoxidil） A 黑种草油 A Viviscal A 铁 B 角蛋白（Keratin） B Omega-3 脂肪酸 B

维生素 B12 用于其他健康状况

营养缺乏性脱发 F

快速结论

基于13项研究，共8,121名参与者。各研究结果不一。

Evidence Strength10%

Low confidence

研究分析

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

对比替代方案

查看其他成分针对该健康状况的对比结果。

查看所有成分用于休止期脱发

了解更多

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

FDA 免责声明: 这些声明未经美国食品药品监督管理局（FDA）评估。本网站上的产品和信息无意用于诊断、治疗、治愈或预防任何疾病。所展示的证据等级基于我们对已发表的同行评审研究的分析，不构成医疗建议。在开始任何补充剂方案之前，请务必咨询您的医疗保健提供者。

维生素 B12 用于 休止期脱发