ビタミンD ：円形脱毛症

Q: Does ビタミンD help with 円形脱毛症?

Based on 98 studies with 9,086,791 participants, there is strong evidence from multiple clinical trials that ビタミンD may support 円形脱毛症 management. Our evidence grade is A (Strong Evidence).

Q: How much ビタミンD should I take for 円形脱毛症?

Studies have used various dosages. A commonly studied range is 600-800 IU/day. Always consult your healthcare provider before starting any supplement regimen.

Q: Are there side effects of ビタミンD?

Reported side effects may include Hypercalcemia at very high doses (nausea, vomiting, weakness), Kidney stones with excessive long-term use, Constipation, Metallic taste. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

Q: How strong is the evidence for ビタミンD and 円形脱毛症?

We rate the evidence as Grade A (Strong Evidence). This rating is based on 98 peer-reviewed studies with 9,086,791 total participants. The overall direction of effect is mixed.

合計9,085,485名の参加者を対象とした62件の研究（メタアナリシス8件、RCT 1件を含む）に基づく。大半の研究で否定的または効果なしの結果が示されている。

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結論

While people with alopecia areata often have lower vitamin D levels, research suggests that vitamin D supplementation alone does not reliably help with this condition.

62 studies confirm an association between low vitamin D and alopecia areata
Multiple meta-analyses find correlation but not causation
Supplementation has not shown consistent benefits for hair regrowth in alopecia areata
Low vitamin D may be a marker of autoimmune activity rather than a cause of hair loss

Key Study Findings

Meta-analysis

Vitamin D and its Analogs in Treatment of Mild to Moderate Alopecia Areata: Systematic Review …

Dose: Topical or intralesional vitamin D3 and analogs (various doses and formulations) vs: Placebo 効果: OR=3.20 (95% CI: 1.24-8.24) for intralesional vitamin D3; MD=2.11 (topical); MD=-4.73 vs intralesion None

narrative review

Addressing the Root Causes of Female Hair Loss and Non-Pharmaceutical Interventions.

Dose: None vs: Placebo 効果: None None

Meta-Analysis n=4931

Association Between Serum Trace Elements Level and Alopecia Areata: A Systematic Review and Meta-Analysis.

Dose: None vs: Placebo 効果: SMD=-0.93 (vitamin D); SMD=-0.69 (zinc); OR=2.48 (vitamin D deficiency risk) p<0.05

Review

Vitamin D and Alopecia Areata: From Mechanism to Therapeutic Implications.

Dose: None vs: Placebo 効果: None None

Case-Control n=144 Open-label

Tru9I Variant as a Novel Genetic Marker for Vitamin D Deficiency in Alopecia Areata.

Dose: None vs: 72 AA patients vs 72 age/sex-matched healthy controls Outcome: Vitamin D levels and VDR gene expression by … 効果: None None

対象集団: Alopecia areata patients vs healthy controls

Observational Study n=72

Cardiovascular Risk and Systemic Inflammation in Alopecia Areata: An Observational Case-control Study.

Dose: None vs: Healthy controls Outcome: CVR and systemic inflammation in alopecia areata 効果: None None

対象集団: 36 AA patients vs 36 matched controls, mean age 39

Key Statistics

研究数

9086791

参加者数

↔

Mixed

グレード

Referenced Papers

Vitamin D and its Analogs in Treatment of Mild to Moderate Alopecia Areata: Systematic Review and Meta-Analysis. Other

Indian dermatology online … 2026 3 件の引用

Association Between Serum Trace Elements Level and Alopecia Areata: A Systematic Review and Meta-Analysis. Meta-Analysis

Journal of cosmetic … 2025 5 件の引用

Vitamin D and Alopecia Areata: From Mechanism to Therapeutic Implications. Other

Skin appendage disorders 2025 5 件の引用

Comparison of Safety and Efficacy of Topical Mometasone 0.1% Ointment, Calcipotriol 0.005% Ointment, and Tacrolimus 0.1% Ointment in Patients with … Other

Indian dermatology online … 2025 1 件の引用

Tru9I Variant as a Novel Genetic Marker for Vitamin D Deficiency in Alopecia Areata. Other

Clinical, cosmetic and … 2025 1 件の引用

Addressing the Root Causes of Female Hair Loss and Non-Pharmaceutical Interventions. Review

Journal of drugs … 2025

Cardiovascular Risk and Systemic Inflammation in Alopecia Areata: An Observational Case-control Study. Observational

Acta dermatovenerologica Croatica … 2025

Efficacy and Safety of Oral Betamethasone Mini-Pulses in Moderate to Severe Alopecia Areata. Other

Cureus 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 件の引用

Serum 25 hydroxyvitamin D in non-scarring alopecia: A systematic review and meta-analysis. Meta-Analysis

Journal of cosmetic … 2024 7 件の引用

C-reactive protein as a novel biomarker for vitamin D deficiency in alopecia areata. Other

Skin research and … 2024 6 件の引用

Vitamin D deficiency in non-scarring and scarring alopecias: a systematic review and meta-analysis. Systematic Review

Frontiers in nutrition 2024 4 件の引用

Efficacy and Safety of Topical Tofacitinib for the Treatment of Alopecia Areata. Other

Indian dermatology online … 2024 3 件の引用

Intralesional vitamin D3 versus intralesional triamcinolone acetonoid in patchy alopecia areata: a comparative clinical and dermoscopic study. Other

Journal of cosmetic … 2024 1 件の引用

Vitiligo: Clinical and Laboratory Characteristics in 573 Saudi Patients. Other

Clinical, cosmetic and … 2024

Filling the Gaps: Vitamin D Status in Diffuse Hair Fall Among Pakistanis. Other

Dermatology practical & … 2024

Association of vitamin D with risk of warts: A retrospective and Mendelian randomization study. Other

Skin research and … 2024

Comorbid Conditions Associated with Alopecia Areata: A Systematic Review and Meta-analysis. Meta-Analysis

American journal of … 2023 41 件の引用

Differential impact of environmental factors on systemic and localized autoimmunity. Review

Frontiers in immunology 2023 33 件の引用

Trichoscopy pattern in alopecia areata: A systematic review and meta-analysis. Meta-Analysis

Skin research and … 2023 28 件の引用

Biomarkers in alopecia Areata: A systematic review and meta-analysis. Meta-Analysis

Autoimmunity reviews 2023 24 件の引用

Comparative evaluation of the efficacy of topical tacrolimus 0.03% and topical calcipotriol 0.005% mixed with betamethasone dipropionate versus topical clobetasol … RCT

Journal of cosmetic … 2023 10 件の引用

The Role of VD/VDR Signaling Pathway in Autoimmune Skin Diseases. Review

Mini reviews in … 2023 9 件の引用

Etiology, management, and outcomes of pediatric telogen effluvium: A single-center study in the United States. Other

Pediatric dermatology 2023 9 件の引用

Combined microneedling with topical vitamin D3 or bimatoprost versus microneedling alone in the treatment of alopecia areata: A comparative randomized … RCT

Journal of cosmetic … 2023 8 件の引用

Trichoscopy pattern and evaluation of serum vitamin D status in alopecia areata. Other

Photodiagnosis and photodynamic … 2023 5 件の引用

Inverse correlation between vitamin D and CRP levels in alopecia areata: A pilot study. Other

Journal of cosmetic … 2023 4 件の引用

Fractional carbon dioxide laser alone and as an assisted drug delivery for treatment of alopecia areata: a clinical, dermoscopic and … Other

Archives of dermatological … 2023 3 件の引用

Serum brain-derived neurotrophic factor and vitamin D: Two concordant players controlling depression among alopecia areata and vitiligo patients: A case-control … Other

Journal of cosmetic … 2023 3 件の引用

The development of non-scarring alopecia in women who wear the hijab. Other

Archives of dermatological … 2023 3 件の引用

Effects of age and sex on the comorbidities of alopecia areata: A cross-sectional hospital-based study. Other

Health science reports 2023 3 件の引用

Determination of Serum 25-Hydroxyvitamin D Levels in Patients with Alopecia Areata. Other

Journal of Nepal … 2023

Intralesional vitamin D3 in treatment of alopecia areata: A randomized controlled clinical trial. RCT

Journal of cosmetic … 2022 23 件の引用

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

Journal of cosmetic … 2022 22 件の引用

Evaluation of several immune and inflammatory indicators and their association with alopecia areata. Other

Journal of cosmetic … 2022 11 件の引用

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

Turkish journal of … 2022 8 件の引用

Retrospective evaluation of clinical profile and comorbidities in patients with alopecia areata. Other

Northern clinics of … 2022 7 件の引用

Reply to "Vitamin D status in scarring and nonscarring alopecia". Other

Journal of the … 2022 6 件の引用

Vitamin D supplementation for patients with alopecia areata: A protocol for systematic review and meta-analysis. Other

Medicine 2022 4 件の引用

Vitamin D Levels in Alopecia Areata and Other Alopecias: A Retrospective Case- Control Study at a Single Institution. Other

International journal of … 2022 4 件の引用

Predictors of Vitamin D Insufficiency in Children and Adolescents With Alopecia Areata. Other

Cureus 2022 3 件の引用

Rare Concurrence of Alopecia Areata in the Setting of the Lipedematous Scalp. Case Report

The American Journal … 2022 2 件の引用

Telogen Effluvium - a review of the science and current obstacles. Review

Journal of dermatological … 2021 51 件の引用

Role of vitamin D in hair loss: A short review. Review

Journal of cosmetic … 2021 44 件の引用

Characteristics of telogen effluvium in COVID-19 in western Iran (2020). Other

Anais brasileiros de … 2021 26 件の引用

Prevalence of Low Serum Vitamin D Levels in Patients Presenting With Androgenetic Alopecia: A Review. Review

Cureus 2021 20 件の引用

Paediatric lichen sclerosus et atrophicus: A retrospective analysis of 38 paediatric patients. Other

International journal of … 2021 14 件の引用

Efficacy of Oral Vitamin D3 Therapy in Patients Suffering from Diffuse Hair Loss (Telogen Effluvium). Other

Journal of nutritional … 2021 12 件の引用

Treatment of alopecia totalis/universalis/focalis with vitamin D and analogs: Three case reports and a literature review. Case Report

World journal of … 2021 10 件の引用

Association Between Vitamin D and Zinc Levels With Alopecia Areata Phenotypes at a Tertiary Care Center. Other

Cureus 2021 7 件の引用

Alopecia Universalis Occurring after Alemtuzumab Treatment for Multiple Sclerosis. A Two-Year Follow-Up of Two Patients. Case Report

International journal of … 2021 6 件の引用

Determination of serum 25-hydroxyvitamin D levels in patients with alopecia areata and their comparison with levels in healthy controls: A … Other

JAAD international 2021 5 件の引用

Squaric acid dibutyl ester for the treatment of alopecia areata: A retrospective evaluation. Other

Dermatologic therapy 2021 2 件の引用

Comorbidities in pediatric alopecia areata. Other

Journal of the … 2020 57 件の引用

Efficacy and Safety of Topical Calcipotriol 0.005% Versus Topical Clobetasol 0.05% in the Management of Alopecia Areata: An Intrasubject Pilot … Other

Dermatology and therapy 2020 25 件の引用

Study of serum vitamin D levels in men with premature androgenetic alopecia. Other

International journal of … 2020 18 件の引用

Serum 25 hydroxyvitamin D levels in alopecia areata, female pattern hair loss, and male androgenetic alopecia in a Chinese population. Other

Journal of cosmetic … 2020 17 件の引用

Association of Alopecia Areata with Vitamin D and Calcium Levels: A Systematic Review and Meta-analysis. Review

Dermatology and therapy 2020 14 件の引用

Trichotillomania associated with a 25-hydroxy vitamin D deficiency: A case report. Case Report

The mental health … 2020 7 件の引用

Combined Diet and Supplementation Therapy Resolves Alopecia Areata in a Paediatric Patient: A Case Study. Case Report

Cureus 2020 5 件の引用

Comorbidities in alopecia areata: A systematic review and meta-analysis. Meta-Analysis

Journal of the … 2019 189 件の引用

Vitamin D and alopecia areata: possible roles in pathogenesis and potential implications for therapy. Review

American journal of … 2019 43 件の引用

Vitamin D and the Skin: A Review for Dermatologists. Review

Actas dermo-sifiliograficas 2019 43 件の引用

Serum Vitamin D Levels and Alopecia Areata- A Hospital Based Case-Control Study from North-India. Other

International journal of … 2019 27 件の引用

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

Journal of cosmetic … 2019 25 件の引用

Evaluation of Association of Vitamin D in Alopecia Areata: A Case-control Study of 100 Patients in a Tertiary Rural Hospital … Other

Indian dermatology online … 2019 13 件の引用

Study on Serum Vitamin D in Alopecia Areata Patients. Other

Journal of Nepal … 2019 8 件の引用

Vitamin D supplementation for the prevention or depletion of side effects of therapy with alemtuzumab in multiple sclerosis. Other

Therapeutics and clinical … 2019 4 件の引用

Vitamin D and the Skin: An Update for Dermatologists. Review

American journal of … 2018 138 件の引用

Increased prevalence of vitamin D deficiency in patients with alopecia areata: a systematic review and meta-analysis. Meta-Analysis

Journal of the … 2018 57 件の引用

An investigation of vitamin D status in alopecia areata. Other

Clinical and experimental … 2018 50 件の引用

Correlation of vitamin D and vitamin D receptor expression in patients with alopecia areata: a clinical paradigm. Other

International journal of … 2018 47 件の引用

Serum vitamin D level is related to disease severity in pediatric alopecia areata. Other

Journal of cosmetic … 2018 39 件の引用

Vitamin D deficiency in patients with alopecia areata: A systematic review and meta-analysis. Meta-Analysis

Journal of the … 2018 27 件の引用

Serum vitamin D level and disease severity of alopecia areata: A meta-regression analysis. Other

Journal of the … 2018 6 件の引用

Response to "Vitamin D deficiency in patients with alopecia areata: A systematic review and meta-analysis" and an investigation of vitamin … Other

Journal of the … 2018 3 件の引用

Authors' Reply to Critical Comment on "Vitamin D Level in Alopecia Areata". Other

Indian journal of … 2018 1 件の引用

Reply to: "Serum vitamin D level and disease severity of alopecia areata: A meta-regression analysis". Other

Journal of the … 2018 1 件の引用

Critical Comment on "Vitamin D Level in Alopecia Areata". Other

Indian journal of … 2018

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

American journal of … 2017 104 件の引用

The Role of Vitamin D in Non-Scarring Alopecia. Review

International journal of … 2017 61 件の引用

Efficacy and safety of topical calcipotriol in management of alopecia areata: A pilot study. Other

Dermatologic therapy 2017 56 件の引用

Vitamin D Level in Alopecia Areata. Other

Indian journal of … 2017 46 件の引用

25-hydroxyvitamin D status in patients with alopecia areata. Other

Postepy dermatologii i … 2017 31 件の引用

Vitamin D Deficiency in Alopecia Areata. Other

Journal of the … 2017 7 件の引用

Vitamin D Deficiency in an Alopecia Referral Clinic During a 3-Month Period: The Need to Pursue Systemic Screening. Other

Skinmed 2017 1 件の引用

The role of serum vitamin D levels in vitiligo. Other

Postepy dermatologii i … 2016 59 件の引用

Serum Vitamin D in patients with alopecia areata. Other

Indian dermatology online … 2016 51 件の引用

Assessment of vitamin D receptors in alopecia areata and androgenetic alopecia. Other

Journal of cosmetic … 2016 43 件の引用

Estimated serum vitamin D status, vitamin D intake, and risk of incident alopecia areata among US women. Other

Archives of dermatological … 2016 28 件の引用

Nutrition and skin: Kids are not just little people. Review

Clinics in dermatology 2016 19 件の引用

Topical Calcipotriol Therapy for Mild-to-Moderate Alopecia Areata: A Retrospective Study. Other

Journal of drugs … 2015 50 件の引用

Current Treatments for Alopecia Areata. Review

The journal of … 2015 25 件の引用

Association between vitamin D levels and alopecia areata. Other

The Israel Medical … 2014 79 件の引用

Vitamin D deficiency in alopecia areata. Other

The British journal … 2014 74 件の引用

Emerging treatments in alopecia. Review

Expert opinion on … 2014 57 件の引用

Off-label uses of topical vitamin D in dermatology: a systematic review. Systematic Review

Journal of cutaneous … 2014 35 件の引用

Potential relationship between the canonical Wnt signalling pathway and expression of the vitamin D receptor in alopecia. Other

Clinical and experimental … 2014 33 件の引用

Reduced level of 25-hydroxyvitamin D in chronic/relapsing Alopecia Areata. Other

Dermato-endocrinology 2013 62 件の引用

Retinoids putting the "a" in alopecia. Other

The Journal of … 2013 10 件の引用

Vitamin D-dependent rickets type II: report of a novel mutation in the vitamin D receptor gene. Case Report

Archives of Iranian … 2008

Vitamin D receptor gene polymorphisms are not associated with alopecia areata. Other

International journal of … 2007 20 件の引用

Lack of association between Vitamin D receptor FokI polymorphism and alopecia areata. Other

European journal of … 2004

[The treatment of alopecia areata and of dyshidrotic eczema with milk protein bound vitamin D 2]. Other

Deutsche medizinische Wochenschrift … 1955

Dosage & Usage

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

一般的な使用量

general:: 600-800 IU/day
deficiency:: 1,000-5,000 IU/day

上限量： 4,000 IU/day

研究で検討された用量

用量	期間	効果	N
Topical or intralesional vitamin D3 and analogs (various doses and formulations)	--	Positive	--
None	--	Positive	--
None	--	Negative	4931
None	--	Positive	--
None	--	Positive	144
None	--	Negative	72
Topical ointment application (3 arms)	8 weeks	Positive	--
oral betamethasone 2 mg (children) or 4 mg (adults) two consecutive days per week for at least 3 mon	12 weeks	Positive	40

推奨摂取タイミング： With a fat-containing meal for optimal absorption

Safety & Side Effects

報告されている副作用

⚠ Hypercalcemia at very high doses (nausea, vomiting, weakness)
⚠ Kidney stones with excessive long-term use
⚠ Constipation
⚠ Metallic taste

既知の相互作用

● Thiazide diuretics (may increase risk of hypercalcemia)
● Corticosteroids (reduce vitamin D absorption and metabolism)
● Orlistat and cholestyramine (reduce fat-soluble vitamin absorption)

耐容上限摂取量： 4,000 IU/day

サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。

Frequently Asked Questions

Does ビタミンD help with 円形脱毛症?

Based on 98 studies with 9,086,791 participants, there is strong evidence from multiple clinical trials that ビタミンD may support 円形脱毛症 management. Our evidence grade is A (Strong Evidence).

How much ビタミンD should I take for 円形脱毛症?

Studies have used various dosages. A commonly studied range is 600-800 IU/day. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of ビタミンD?

Reported side effects may include Hypercalcemia at very high doses (nausea, vomiting, weakness), Kidney stones with excessive long-term use, Constipation, Metallic taste. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for ビタミンD and 円形脱毛症?

We rate the evidence as Grade A (Strong Evidence). This rating is based on 98 peer-reviewed studies with 9,086,791 total participants. The overall direction of effect is mixed.

Related Evidence

に関する他の成分：円形脱毛症

ミノキシジル A PRP療法 A マイクロニードリング A ブラックシードオイル A 高麗人参 C 亜鉛 F

ビタミンD 他の症状・状態について

女性型脱毛症 A 休止期脱毛症 F

総合評価

Evidence Strength92%

High confidence

研究の内訳

RCT (3)Meta (8)Other (87)

代替成分との比較

この症状に対する他の成分との比較をご覧ください。

に関するすべての成分を見る：円形脱毛症

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FDAに関する免責事項: これらの記述は米国食品医薬品局（FDA）による評価を受けていません。本ウェブサイトの製品および情報は、疾病の診断、治療、治癒、または予防を目的としたものではありません。表示されているエビデンスグレードは、公開された査読済み研究の分析に基づいており、医療上の助言を構成するものではありません。サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。

ビタミンD ： 円形脱毛症