ビタミンD ： 女性型脱毛症
A合計15,494名の参加者を対象とした18件の研究（メタアナリシス2件を含む）に基づく。研究間で結果にばらつきが見られる。
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A
結論
Research shows that women with pattern hair loss often have lower vitamin D levels, but supplementing with vitamin D alone is unlikely to significantly improve this condition — it may be one supportive factor among many.
- Lower vitamin D levels are consistently found in women with pattern hair loss
- Supplementation alone is less effective than established options like minoxidil
- Vitamin D receptor gene variants may influence susceptibility
- Maintaining adequate vitamin D may support overall hair health but is not a standalone solution
Key Study Findings
narrative review
Addressing the Root Causes of Female Hair Loss and Non-Pharmaceutical Interventions.
Dose: None
vs: Placebo
効果: None
None
Meta-analysis
Vitamin D deficiency in non-scarring and scarring alopecias: a systematic review and meta-analysis.
Dose: None
vs: Placebo
効果: OR=2.84 (AA vs controls), OR=5.24 (FPHL vs controls)
p<0.01
cross-sectional observational
n=120
Filling the Gaps: Vitamin D Status in Diffuse Hair Fall Among Pakistanis.
Dose: None
vs: Placebo
効果: 79.17% of patients with diffuse hair fall were vitamin D3 deficient (mean 17.33 ± 5.43 ng/mL)
None
meta_analysis
n=10670
Serum 25 hydroxyvitamin D in non-scarring alopecia: A systematic review and meta-analysis.
Dose: not applicable (observational meta-analysis)
vs: Placebo
効果: WMD -7.29 ng/mL (95% CI -9.21, -5.38); OR for vitamin D deficiency 3.11 (95% CI 2.29, 4.22)
not explicitly stated; CI does
Case-control
n=165
The development of non-scarring alopecia in women who wear the hijab.
Dose: None
vs: Placebo
効果: OR=4.1 (95% CI 1.2-14.1) for vitamin D deficiency and telogen effluvium
p=0.02
Other
Serum ferritin and vitamin D levels in women with non-scarring alopecia.
Dose: None
vs: None
Outcome: None
効果: None
None
対象集団: Women with non-scarring alopecia
Key Statistics
19
研究数
15494
参加者数
↔
Mixed
A
グレード
Referenced Papers
Journal of drugs …
2025
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
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
Dermatology practical & …
2024
Archives of dermatological …
2023
3 件の引用
Journal of cosmetic …
2022
10 件の引用
Journal of cosmetic …
2022
4 件の引用
Journal of cosmetic …
2021
44 件の引用
International journal of …
2020
18 件の引用
Journal of cosmetic …
2020
17 件の引用
The mental health …
2020
7 件の引用
Indian journal of …
2020
5 件の引用
Female Pattern Hair Loss and Androgen Excess: A Report From the Multidisciplinary Androgen Excess and PCOS Committee.
Meta-Analysis
The Journal of …
2019
101 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
Experimental dermatology
2017
82 件の引用
International journal of …
2017
61 件の引用
International journal of …
2016
42 件の引用
International journal of …
2016
28 件の引用
Skin pharmacology and …
2013
127 件の引用
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 |
|---|---|---|---|
| None | -- | Positive | -- |
| None | -- | Negative | -- |
| None | -- | Neutral | 120 |
| not applicable (observational meta-analysis) | -- | Negative | 10670 |
| None | -- | Positive | 165 |
| None | -- | Mixed | -- |
| None | -- | Negative | -- |
| 1000 IU vitamin D3 daily | 16 weeks | Positive | 2 |
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 女性型脱毛症?
Based on 19 studies with 15,494 participants, there is strong evidence from multiple clinical trials that ビタミンD may support 女性型脱毛症 management. Our evidence grade is A (Strong Evidence).
How much ビタミンD should I take for 女性型脱毛症?
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 女性型脱毛症?
We rate the evidence as Grade A (Strong Evidence). This rating is based on 19 peer-reviewed studies with 15,494 total participants. The overall direction of effect is mixed.
Related Evidence
に関する他の成分： 女性型脱毛症
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。