维生素 D 用于 斑秃
A基于62项研究(8项荟萃分析、1项RCT),共9,085,485名参与者。多数研究显示无效果或负面效果。
结论
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
研究人群: Alopecia areata patients vs healthy controls
研究人群: 36 AA patients vs 36 matched controls, mean age 39
Key Statistics
98
研究数量
9086791
受试者
Mixed
等级
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
常用剂量
- general:
- 600-800 IU/day
- deficiency:
- 1,000-5,000 IU/day
上限: 4,000 IU/day
研究中使用的剂量
| 剂量 | 持续时间 | 效果 | 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 |
最佳服用时间: With a fat-containing meal for optimal absorption
Safety & Side Effects
已报告的副作用
- ⚠ Hypercalcemia at very high doses (nausea, vomiting, weakness)
- ⚠ Kidney stones with excessive long-term use
- ⚠ Constipation
- ⚠ Metallic taste
已知相互作用
- ● Thiazide diuretics (may increase risk of hypercalcemia)
- ● Corticosteroids (reduce vitamin D absorption and metabolism)
- ● Orlistat and cholestyramine (reduce fat-soluble vitamin absorption)
可耐受最高摄入量: 4,000 IU/day
在开始服用任何补充剂之前,请务必咨询您的医疗保健提供者。
Frequently Asked Questions
Does 维生素 D help with 斑秃?
How much 维生素 D should I take for 斑秃?
Are there side effects of 维生素 D?
How strong is the evidence for 维生素 D and 斑秃?
Related Evidence
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