ノコギリヤシ ： 女性型脱毛症
B エビデンス 少なくとも1件のランダム化試験がこれを支持しており、おおむね一貫した結果が得られています。合計120名の参加者を対象とした3件の研究（RCT 2件を含む）に基づく。3件中3件の研究で肯定的な効果が示されている。
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B
結論
Early clinical trial evidence suggests that saw palmetto may help promote hair growth in women with pattern hair loss, but the research is still limited to a small number of studies.
- All 3 studies show positive effects, including 2 RCTs
- Improvements seen at both 90 and 180 days of use
- Only 120 total participants — small evidence base
- More research with different formulations is needed to confirm broad applicability
Key Study Findings
randomized controlled trial
n=60
26 weeks
Double-blind
The Safety and Efficacy of a Novel Saw Palmetto (Serenoa repens) Extract for Promoting Hair …
Dose: proprietary saw palmetto (Serenoa repens) bioactive fatty acid extract (SEREVELLE) daily; dose not s
vs: Placebo
効果: terminal hair count: +18.6 vs -10.1 (283% greater); vellus hair: +6.6 vs -2.1 (414% greater); hair d
<0.001 (terminal hair, density
narrative review
Addressing the Root Causes of Female Hair Loss and Non-Pharmaceutical Interventions.
Dose: None
vs: Placebo
効果: None
None
randomized controlled trial
n=60
12.9 weeks
Double-blind
The Safety and Efficacy of a Proprietary Bioactive Fatty Acids Extract From Saw Palmetto (Serenoa …
Dose: Proprietary saw palmetto (Serenoa repens) bioactive fatty acids extract, 1 oral dose daily for 90 da
vs: Placebo
効果: Active group: anterior terminal hair count p<0.0007 vs baseline; significant vs placebo anterior p<0
0.0007
Key Statistics
3
研究数
120
参加者数
↑
Positive
B
グレード
Referenced Papers
Journal of cosmetic …
2026
Journal of cosmetic …
2025
1 件の引用
Journal of drugs …
2025
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
一般的な使用量
- general:
- 320 mg/day
- hairloss:
- 320 mg/day standardized extract
上限量： Not established
研究で検討された用量
| 用量 | 期間 | 効果 | N |
|---|---|---|---|
| proprietary saw palmetto (Serenoa repens) bioactive fatty acid extract (SEREVELLE) daily; dose not s | 26 weeks | Positive | 60 |
| None | -- | Positive | -- |
| Proprietary saw palmetto (Serenoa repens) bioactive fatty acids extract, 1 oral dose daily for 90 da | 12.9 weeks | Positive | 60 |
推奨摂取タイミング： With meals to reduce gastrointestinal side effects
Safety & Side Effects
報告されている副作用
- ⚠ Mild gastrointestinal upset (nausea, diarrhea)
- ⚠ Headache
- ⚠ Dizziness
- ⚠ Rare: decreased libido
既知の相互作用
- ● Anticoagulants and antiplatelet drugs (may increase bleeding risk)
- ● Oral contraceptives and hormone replacement therapy (anti-androgenic effects)
- ● Finasteride and dutasteride (additive 5-alpha-reductase inhibition)
耐容上限摂取量： Not established
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 ノコギリヤシ help with 女性型脱毛症?
Based on 3 studies with 120 participants, there is moderate evidence from clinical studies that ノコギリヤシ may support 女性型脱毛症 management. Our evidence grade is B (Good Evidence).
How much ノコギリヤシ should I take for 女性型脱毛症?
Studies have used various dosages. A commonly studied range is 320 mg/day. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of ノコギリヤシ?
Reported side effects may include Mild gastrointestinal upset (nausea, diarrhea), Headache, Dizziness, Rare: decreased libido. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for ノコギリヤシ and 女性型脱毛症?
We rate the evidence as Grade B (Good Evidence). This rating is based on 3 peer-reviewed studies with 120 total participants. The overall direction of effect is positive.
Related Evidence
に関する他の成分： 女性型脱毛症
ノコギリヤシ 他の症状・状態について
References
- [1] Glynis Ablon. J Cosmet Dermatol. 2026. The Safety and Efficacy of a Novel Saw Palmetto (Serenoa repens) Extract for Promoting Hair Growth in Adults With Self-Perceived … doi:10.1111/jocd.70717 PubMed
- [2] Glynis Ablon. J Cosmet Dermatol. 2025. The Safety and Efficacy of a Proprietary Bioactive Fatty Acids Extract From Saw Palmetto (Serenoa repens) for Promoting Hair Growth … doi:10.1111/jocd.70585 PubMed
- [3] Adam Leavitt et al.. J Drugs Dermatol. 2025. Addressing the Root Causes of Female Hair Loss and Non-Pharmaceutical Interventions. doi:10.36849/JDD.8763 PubMed
FDAに関する免責事項: これらの記述は米国食品医薬品局（FDA）による評価を受けていません。本ウェブサイトの製品および情報は、疾病の診断、治療、治癒、または予防を目的としたものではありません。表示されているエビデンスグレードは、公開された査読済み研究の分析に基づいており、医療上の助言を構成するものではありません。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。