Vitamin D for Female Pattern Hair Loss
ABased on 19 studies (2 meta-analyses) with 15,494 total participants. Results are mixed across studies.
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A
The Bottom Line
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
Effect: None
None
Meta-analysis
Vitamin D deficiency in non-scarring and scarring alopecias: a systematic review and meta-analysis.
Dose: None
vs: Placebo
Effect: 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
Effect: 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
Effect: 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
Effect: 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
Effect: None
None
Population: Women with non-scarring alopecia
Key Statistics
19
Studies
15494
Participants
↔
Mixed
A
Grade
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 citations
Vitamin D deficiency in non-scarring and scarring alopecias: a systematic review and meta-analysis.
Systematic Review
Frontiers in nutrition
2024
4 citations
Dermatology practical & …
2024
Archives of dermatological …
2023
3 citations
Journal of cosmetic …
2022
10 citations
Journal of cosmetic …
2022
4 citations
Journal of cosmetic …
2021
44 citations
International journal of …
2020
18 citations
Journal of cosmetic …
2020
17 citations
The mental health …
2020
7 citations
Indian journal of …
2020
5 citations
Female Pattern Hair Loss and Androgen Excess: A Report From the Multidisciplinary Androgen Excess and PCOS Committee.
Meta-Analysis
The Journal of …
2019
101 citations
NonScarring Diffuse Hair Loss in Women: a Clinico-Etiological Study from tertiary care center in North-West India.
Observational
Journal of cosmetic …
2019
25 citations
Experimental dermatology
2017
82 citations
International journal of …
2017
61 citations
International journal of …
2016
42 citations
International journal of …
2016
28 citations
Skin pharmacology and …
2013
127 citations
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 600-800 IU/day
- deficiency:
- 1,000-5,000 IU/day
Upper limit: 4,000 IU/day
Dosages Studied in Research
| Dosage | Duration | Effect | 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 |
Best taken: With a fat-containing meal for optimal absorption
Safety & Side Effects
Reported Side Effects
- ⚠ Hypercalcemia at very high doses (nausea, vomiting, weakness)
- ⚠ Kidney stones with excessive long-term use
- ⚠ Constipation
- ⚠ Metallic taste
Known Interactions
- ● Thiazide diuretics (may increase risk of hypercalcemia)
- ● Corticosteroids (reduce vitamin D absorption and metabolism)
- ● Orlistat and cholestyramine (reduce fat-soluble vitamin absorption)
Tolerable upper intake: 4,000 IU/day
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Vitamin D help with Female Pattern Hair Loss?
Based on 19 studies with 15,494 participants, there is strong evidence from multiple clinical trials that Vitamin D may support Female Pattern Hair Loss management. Our evidence grade is A (Strong Evidence).
How much Vitamin D should I take for Female Pattern Hair Loss?
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 Vitamin 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 Vitamin D and Female Pattern Hair Loss?
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
Other ingredients for Female Pattern Hair Loss
Vitamin D for other conditions
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.