叶酸（Folate） 用于 营养缺乏性脱发
F基于11项研究，共4,429名参与者。各研究结果不一。
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F
结论
The evidence linking folate supplementation to hair regrowth is limited and mixed — folate deficiency may contribute to hair loss in some cases, but supplementation is not well-supported as a general hair loss remedy.
- Results are mixed across 11 studies, with no clear consensus on folate's role in hair loss
- No randomized controlled trials have specifically tested folate supplementation for hair regrowth
- Folate deficiency may be more relevant when caused by medications (e.g., methotrexate) rather than diet
- Blood testing for folate levels may help determine if supplementation is appropriate
Key Study Findings
In Vitro
7-Hydroxycannabidiol and 7-carboxycannabidiol induced cytotoxicity via apoptosis and endoplasmic reticulum stress in human hepatic cells.
Dose: None
vs: Untreated hepatic cells
Outcome: Cytotoxicity via apoptosis and ER stress
效果: None
None
研究人群: Primary human hepatocytes and HepG2 cells
Review
Safety First: A Comprehensive Review of Nutritional Supplements for Hair Loss in Breast Cancer Patients.
Dose: None
vs: Placebo
效果: None
None
Review
Medical Marijuana and Treatment Personalization: The Role of Genetics and Epigenetics in Response to THC …
Dose: None
vs: None
Outcome: None
效果: None
None
研究人群: Review of pharmacogenomics of THC and CBD
In Vitro
2 weeks
Quality and safety of hemp meal as a protein supplement for nonlactating dairy cows.
Dose: 10.2% d
vs: None
Outcome: glycemic control
效果: None
None
研究人群: Cows
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
Key Statistics
11
研究数量
4166
受试者
↔
Mixed
F
等级
Referenced Papers
Nutrients
2025
2 次引用
Archives of toxicology
2025
1 次引用
Genes
2025
1 次引用
Journal of dairy …
2023
8 次引用
Dermatology practical & …
2023
4 次引用
Journal of cosmetic …
2022
22 次引用
Medical cannabis and …
2018
158 次引用
American journal of …
2017
104 次引用
Journal of drugs …
2016
56 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 | -- | Negative | -- |
| None | -- | Mixed | -- |
| None | -- | Mixed | -- |
| 10.2% d | 2 weeks | Mixed | -- |
| None | -- | Positive | 973 |
| standard replacement doses | -- | Neutral | 3028 |
| None | -- | Positive | -- |
| 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 营养缺乏性脱发?
Based on 11 studies with 4,166 participants, there is insufficient evidence at this time that 叶酸（Folate） may support 营养缺乏性脱发 management. Our evidence grade is F (Evidence Against).
How much 叶酸（Folate） should I take for 营养缺乏性脱发?
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 营养缺乏性脱发?
We rate the evidence as Grade F (Evidence Against). This rating is based on 11 peer-reviewed studies with 4,166 total participants. The overall direction of effect is mixed.
Related Evidence
其他成分用于 营养缺乏性脱发
叶酸（Folate） 用于其他健康状况
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