Vitamin B12 cho Telogen Effluvium

Q: Does Vitamin B12 help with Telogen Effluvium?

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

Q: How much Vitamin 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 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.

Q: How strong is the evidence for Vitamin 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.

Dựa trên 13 nghiên cứu với 8,121 người tham gia. Kết quả nghiên cứu không đồng nhất.

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Kết luận

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 so với: Placebo Hiệu quả: None None

Retrospective cohort n=2851

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

Dose: None so với: Placebo Hiệu quả: 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 so với: Placebo Hiệu quả: 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 so với: Placebo Hiệu quả: None None

Case-control n=973

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

Dose: None so với: Placebo Hiệu quả: 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 so với: Placebo Hiệu quả: None 0.001

Key Statistics

Nghiên cứu

8121

Người tham gia

↔

Mixed

Xếp hạng

Referenced Papers

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

Journal of cosmetic … 2025 4 trích dẫn

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 trích dẫn

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 trích dẫn

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

Dermatology practical & … 2023 4 trích dẫn

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

Journal of cosmetic … 2022 22 trích dẫn

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

Turkish journal of … 2022 8 trích dẫn

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

Journal of cosmetic … 2019 25 trích dẫn

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

Journal of drugs … 2016 56 trích dẫn

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

Dermatology research and … 2016 26 trích dẫn

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

Acta dermatovenerologica Croatica … 2016 6 trích dẫn

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 trích dẫn

Management of hair loss in women. Review

Dermatologic clinics 1993 38 trích dẫn

Dosage & Usage

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

Liều lượng thường dùng

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

Giới hạn trên: No established UL

Liều lượng đã nghiên cứu

Liều lượng	Thời gian	Hiệu quả	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

Thời điểm dùng tốt nhất: With meals; sublingual form can be taken any time

Safety & Side Effects

Tác dụng phụ đã được báo cáo

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

Tương tác đã biết

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

Mức hấp thụ tối đa cho phép: No established UL

Luôn tham khảo ý kiến bác sĩ trước khi bắt đầu sử dụng bất kỳ thực phẩm bổ sung nào.Luôn tham khảo ý kiến chuyên gia y tế trước khi sử dụng bất kỳ thực phẩm chức năng nào.

Frequently Asked Questions

Does Vitamin B12 help with Telogen Effluvium?

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

How much Vitamin 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 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 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

Các thành phần khác cho Telogen Effluvium

Minoxidil A Dầu Hạt Đen A Viviscal A Sắt B Keratin B Axit Béo Omega-3 B

Vitamin B12 cho các tình trạng khác

Rụng Tóc Do Thiếu Dinh Dưỡng F

Đánh giá nhanh

Dựa trên 13 nghiên cứu với 8,121 người tham gia. Kết quả nghiên cứu không đồng nhất.

Evidence Strength10%

Low confidence

Phân tích nghiên cứu

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

So sánh lựa chọn thay thế

Xem các thành phần khác so sánh như thế nào cho tình trạng này.

Xem tất cả thành phần cho Telogen Effluvium

Tìm hiểu thêm

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