鉄 : 鉄欠乏性脱毛症
A エビデンス 複数の大規模臨床試験が一貫して有意な効果を示しています。合計30,034名の参加者を対象とした73件の研究(メタアナリシス4件を含む)に基づく。研究間で結果にばらつきが見られる。
結論
Iron deficiency is clearly linked to hair loss, and correcting a genuine deficiency may support hair regrowth, but iron supplementation is not universally effective for all types of hair loss.
- 73 studies across 30,034 participants provide extensive evidence on the iron-hair loss connection
- Low serum ferritin levels are frequently observed in patients with hair loss
- Supplementation appears most beneficial when a true iron deficiency is documented
- Iron supplementation without confirmed deficiency may not improve hair outcomes and can carry risks
Key Study Findings
Key Statistics
73
研究数
30034
参加者数
Mixed
グレード
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
一般的な使用量
- general:
- 18 mg/day (women)
- deficiency:
- 65-200 mg elemental iron/day
上限量: 45 mg/day
研究で検討された用量
| 用量 | 期間 | 効果 | N |
|---|---|---|---|
| various | -- | Positive | -- |
| None | -- | Positive | 90 |
| not applicable (observational; serum ferritin measured) | -- | Negative | 100 |
| None | -- | Positive | 150 |
| None | -- | Neutral | 113 |
| None | -- | Neutral | -- |
| iron supplementation, folate, dopamine agonists (non-pharmacological and pharmacological) | -- | Positive | -- |
| None | -- | Neutral | 2851 |
推奨摂取タイミング: On an empty stomach with vitamin C for best absorption; take 2 hours apart from calcium
Safety & Side Effects
報告されている副作用
- ⚠ Constipation (most common)
- ⚠ Nausea and stomach cramps
- ⚠ Dark or black stools
- ⚠ Iron overload with excessive supplementation (hemochromatosis risk)
既知の相互作用
- ● Calcium supplements and dairy (reduce iron absorption by 50-60%)
- ● Proton pump inhibitors (omeprazole) and H2 blockers reduce absorption
- ● Tetracycline and quinolone antibiotics (mutual absorption reduction)
- ● Levothyroxine (iron reduces thyroid hormone absorption)
耐容上限摂取量: 45 mg/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 鉄 help with 鉄欠乏性脱毛症?
How much 鉄 should I take for 鉄欠乏性脱毛症?
Are there side effects of 鉄?
How strong is the evidence for 鉄 and 鉄欠乏性脱毛症?
Related Evidence
に関する他の成分: 鉄欠乏性脱毛症
References
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