Zinc for Alopecia Areata
FBased on 60 studies (3 meta-analyses, 1 RCT) with 23,876 total participants. Results are mixed across studies.
The Bottom Line
While people with alopecia areata often have lower zinc levels, research is mixed on whether zinc supplementation helps — it may support overall immune health but is not a reliable solution for alopecia areata.
- Lower zinc levels are consistently found in alopecia areata patients
- Supplementation studies show inconsistent results for hair regrowth
- Zinc plays a role in immune function, which is relevant to autoimmune hair loss
- No large-scale RCT specifically tests zinc supplementation for alopecia areata
Key Study Findings
Population: review of nonscarring eyebrow alopecia etiologies and management (1960-2025)
Key Statistics
60
Studies
23876
Participants
Mixed
Grade
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 8-11 mg/day
- hairloss:
- 15-30 mg/day
Upper limit: 40 mg/day
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| None | -- | Neutral | -- |
| None | -- | Mixed | -- |
| None | -- | Negative | 4931 |
| None | -- | Positive | -- |
| Tofacitinib 1 mg/kg | -- | Positive | 36 |
| None | -- | Mixed | 7014 |
| None | -- | Neutral | 30 |
| Corticosteroid injections (dose not specified) in transgenic mice | -- | Positive | -- |
Best taken: With meals to minimize stomach upset; separate from iron and calcium by 2 hours
Safety & Side Effects
Reported Side Effects
- ⚠ Nausea and vomiting (especially on an empty stomach)
- ⚠ Metallic taste in the mouth
- ⚠ Copper depletion with chronic high-dose use
- ⚠ Headache and diarrhea
Known Interactions
- ● Copper supplements (zinc inhibits copper absorption at doses >40 mg/day)
- ● Tetracycline and quinolone antibiotics (mutual absorption reduction)
- ● Penicillamine (zinc reduces absorption of this rheumatoid arthritis drug)
Tolerable upper intake: 40 mg/day
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Zinc help with Alopecia Areata?
How much Zinc should I take for Alopecia Areata?
Are there side effects of Zinc?
How strong is the evidence for Zinc and Alopecia Areata?
Related Evidence
Other ingredients for Alopecia Areata
Zinc 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.