叶酸（Folate） 用于 休止期脱发
B基于6项研究，共4,166名参与者。各研究结果不一。
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B
结论
There is limited evidence connecting folate to telogen effluvium — while low folate levels have been observed in some patients, research does not yet support folate supplementation as a reliable approach for this condition.
- Mixed results across 6 studies — no consistent pattern linking folate levels to telogen effluvium
- All studies are observational; no randomized controlled trials exist for this specific use
- Folate is one of many micronutrients that may play a supporting role in hair health
- A comprehensive nutritional assessment may be more useful than supplementing folate alone
Key Study Findings
Retrospective cohort
n=2851
Retrospective Review of 2851 Female Patients With Telogen Effluvium: A Single-Center Experience.
Dose: None
vs: Placebo
效果: Ferritin low in 46.5% of patients; iron deficiency in 29.5%
p<0.05
Review
Safety First: A Comprehensive Review of Nutritional Supplements for Hair Loss in Breast Cancer Patients.
Dose: None
vs: Placebo
效果: None
None
Cross-Sectional Study
n=108
Evaluation of the relationship of digital phototrichogram findings of patients with diffuse hair loss with …
Dose: None
vs: Placebo
效果: None
0.05
Case-control
n=973
Micronutrient Deficiencies and Digital Computerized Phototrichogram Analysis in Telogen Effluvium: a Retrospective Correlation Study in …
Dose: None
vs: Placebo
效果: r=0.417 (HGB and AHR in females)
p=0.008
retrospective cohort study
n=3028
Telogen effluvium in daily practice: Patient characteristics, laboratory parameters, and treatment modalities of 3028 patients …
Dose: standard replacement doses
vs: Placebo
效果: vitamin D deficient: 72.2%; B12 deficient: 30.7%; iron deficiency anemia: 6.2%
None
randomized controlled trial
26 weeks
Comparative evaluation between two nutritional supplements in the improvement of telogen effluvium.
Dose: recommended daily intake amounts; taken orally for 180 days
vs: Placebo
效果: Group 1 trichoscopy improvement 11.09% vs Group 2 7.76% after 180 days (significant for Group 1 only
P<0.05 for clinical parameters
Key Statistics
10
研究数量
7126
受试者
↔
Mixed
B
等级
Referenced Papers
Retrospective Review of 2851 Female Patients With Telogen Effluvium: A Single-Center Experience.
Other
Journal of cosmetic …
2025
4 次引用
Nutrients
2025
2 次引用
Northern clinics of …
2024
1 次引用
Dermatology practical & …
2023
4 次引用
Journal of cosmetic …
2022
22 次引用
Journal of photochemistry …
2018
16 次引用
Comparative evaluation between two nutritional supplements in the improvement of telogen effluvium.
Other
Clinical, cosmetic and …
2018
16 次引用
Journal of drugs …
2016
56 次引用
Acta dermatovenerologica Croatica …
2016
6 次引用
Clinical and experimental …
2009
34 次引用
Dermatologic clinics
1993
38 次引用
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
常用剂量
- general:
- 400 mcg DFE/day
上限： 1,000 mcg/day (synthetic folic acid)
研究中使用的剂量
| 剂量 | 持续时间 | 效果 | N |
|---|---|---|---|
| None | -- | Neutral | 2851 |
| None | -- | Mixed | -- |
| None | -- | Mixed | 108 |
| None | -- | Positive | 973 |
| standard replacement doses | -- | Neutral | 3028 |
| recommended daily intake amounts; taken orally for 180 days | 26 weeks | Positive | -- |
| psychiatric and dermatological management | -- | Neutral | 1 |
| None | -- | Negative | -- |
最佳服用时间： With meals for better absorption
Safety & Side Effects
已报告的副作用
- ⚠ Generally well tolerated
- ⚠ May mask vitamin B12 deficiency symptoms at high doses
- ⚠ Rare: abdominal cramps, insomnia
已知相互作用
- ● Methotrexate (folate antagonist; consult physician)
- ● Anticonvulsants (phenytoin, carbamazepine) may reduce folate levels
- ● Sulfasalazine (reduces folate absorption)
可耐受最高摄入量： 1,000 mcg/day (synthetic folic acid)
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 叶酸（Folate） help with 休止期脱发?
Based on 10 studies with 7,126 participants, there is moderate evidence from clinical studies that 叶酸（Folate） may support 休止期脱发 management. Our evidence grade is B (Good Evidence).
How much 叶酸（Folate） should I take for 休止期脱发?
Studies have used various dosages. A commonly studied range is 400 mcg DFE/day. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of 叶酸（Folate）?
Reported side effects may include Generally well tolerated, May mask vitamin B12 deficiency symptoms at high doses, Rare: abdominal cramps, insomnia. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for 叶酸（Folate） and 休止期脱发?
We rate the evidence as Grade B (Good Evidence). This rating is based on 10 peer-reviewed studies with 7,126 total participants. The overall direction of effect is mixed.
Related Evidence
其他成分用于 休止期脱发
叶酸（Folate） 用于其他健康状况
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