ローズマリーオイル ： 男性型・女性型脱毛症（AGA）
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。10件の研究（メタアナリシス1件を含む）に基づく。10件中9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
Moderate evidence suggests rosemary oil may help support hair growth in androgenetic alopecia, though more large-scale clinical trials are needed to confirm its effectiveness.
- 9 out of 10 studies report positive effects
- Included in Canadian consensus guidelines as a complementary option
- May work through improved scalp circulation and anti-inflammatory activity
- More controlled clinical trials with larger sample sizes are needed
Key Study Findings
Other
Alopecia Management Potential of Rosemary-Based Nanoemulgel Loaded with Metformin: Approach Combining Active Essential Oil and …
Dose: None
vs: Control groups and minoxidil
Outcome: Hair follicle count in rat model
効果: None
None
対象集団: Androgenetic alopecia rat model
Systematic Review
24 weeks
Relative Efficacy of Conventional Monotherapies and Select Nonconventional, Over-the-Counter Products for Male Androgenetic Alopecia: A …
Dose: None
vs: Placebo
Outcome: Change in total hair density at 24 weeks
効果: None
None
対象集団: Males with androgenetic alopecia
review
Single-blind
Do Non-Prescription Products Help in Managing Androgenic Alopecia?
Dose: Various non-prescription agents: procyanidin, cetirizine, caffeine, Oryza sativa bran, pumpkin seed
vs: Placebo
効果: Considerable improvements in one or more parameters across 13 included studies
None
narrative review
Herbal Remedies for Hair Loss: A Review of Efficacy and Safety.
Dose: varies by remedy and study
vs: Placebo
効果: None
None
Review
A Canadian Consensus on Androgenetic Alopecia: Approach and Management.
Dose: None
vs: Placebo
効果: None
None
Review
Integrative sleep management: from molecular pathways to conventional and herbal treatments.
Dose: None
vs: Placebo
効果: None
None
Key Statistics
13
研究数
50
参加者数
↑
Positive
B
グレード
Referenced Papers
Skin appendage disorders
2025
7 件の引用
International journal of …
2025
4 件の引用
Naunyn-Schmiedeberg's archives of …
2025
4 件の引用
Journal of cutaneous …
2025
2 件の引用
Skin appendage disorders
2025
1 件の引用
Journal of cosmetic …
2025
Proceedings (Baylor University. …
2024
14 件の引用
Journal of inflammation …
2024
11 件の引用
Clinical, cosmetic and …
2024
7 件の引用
Dermatologic therapy
2022
41 件の引用
The Journal of …
2020
24 件の引用
Journal of cosmetic …
2019
100 件の引用
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
一般的な使用量
- topical:
- 2-5% dilution, applied to scalp
上限量： Topical only; do not ingest concentrated oil
研究で検討された用量
| 用量 | 期間 | 効果 | N |
|---|---|---|---|
| None | -- | Positive | -- |
| None | 24 weeks | Positive | -- |
| Various non-prescription agents: procyanidin, cetirizine, caffeine, Oryza sativa bran, pumpkin seed | -- | Positive | -- |
| varies by remedy and study | -- | Positive | -- |
| None | -- | Positive | -- |
| None | -- | Positive | -- |
| various CAMs: pumpkin seed oil, saw palmetto, melatonin extract, caffeine extract, rosemary oil | -- | Positive | -- |
| not specified | -- | Positive | -- |
推奨摂取タイミング： Apply diluted oil to scalp and massage for 5 minutes; leave on 30+ minutes or overnight
Safety & Side Effects
報告されている副作用
- ⚠ Contact dermatitis or scalp irritation
- ⚠ Allergic reactions in sensitive individuals
- ⚠ Eye irritation if contact occurs
既知の相互作用
- ● Anticoagulants (rosemary may have mild blood-thinning properties topically)
- ● Other topical hair loss treatments (use at separate times to avoid irritation)
耐容上限摂取量： Topical only; do not ingest concentrated oil
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 ローズマリーオイル help with 男性型・女性型脱毛症（AGA）?
Based on 13 studies with 50 participants, there is moderate evidence from clinical studies that ローズマリーオイル may support 男性型・女性型脱毛症（AGA） management. Our evidence grade is B (Good Evidence).
How much ローズマリーオイル should I take for 男性型・女性型脱毛症（AGA）?
Studies have used various dosages. A commonly studied range is 2-5% dilution, applied to scalp. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of ローズマリーオイル?
Reported side effects may include Contact dermatitis or scalp irritation, Allergic reactions in sensitive individuals, Eye irritation if contact occurs. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for ローズマリーオイル and 男性型・女性型脱毛症（AGA）?
We rate the evidence as Grade B (Good Evidence). This rating is based on 13 peer-reviewed studies with 50 total participants. The overall direction of effect is positive.
Related Evidence
References
- [1] Azhar Ahmed et al.. Skin Appendage Disord. 2025. Herbal Remedies for Hair Loss: A Review of Efficacy and Safety. doi:10.1159/000542876 PubMed
- [2] Kawthar K Abla et al.. Int J Nanomedicine. 2025. Alopecia Management Potential of Rosemary-Based Nanoemulgel Loaded with Metformin: Approach Combining Active Essential Oil and Repurposed Drug. doi:10.2147/IJN.S500487 PubMed
- [3] Yasmina M Ebrahim et al.. Naunyn Schmiedebergs Arch Pharmacol. 2025. Integrative sleep management: from molecular pathways to conventional and herbal treatments. doi:10.1007/s00210-025-04183-y PubMed
- [4] Ian Landells et al.. J Cutan Med Surg. 2025. A Canadian Consensus on Androgenetic Alopecia: Approach and Management. doi:10.1177/12034754251368849 PubMed
- [5] Aditya K Gupta et al.. Skin Appendage Disord. 2025. Do Non-Prescription Products Help in Managing Androgenic Alopecia? doi:10.1159/000542880 PubMed
- [6] Aditya K Gupta et al.. J Cosmet Dermatol. 2025. Relative Efficacy of Conventional Monotherapies and Select Nonconventional, Over-the-Counter Products for Male Androgenetic Alopecia: A Network Meta-Analysis Study. doi:10.1111/jocd.70483 PubMed
- [7] Promise Ufomadu. Proc (Bayl Univ Med Cent). 2024. Complementary and alternative supplements: a review of dermatologic effectiveness for androgenetic alopecia. doi:10.1080/08998280.2023.2263829 PubMed
- [8] Jinkai Li et al.. J Inflamm Res. 2024. Therapeutic Potential of Essential Oils Against Ulcerative Colitis: A Review. doi:10.2147/JIR.S461466 PubMed
- [9] Nouf F Bin Rubaian et al.. Clin Cosmet Investig Dermatol. 2024. An Overview of Commonly Used Natural Alternatives for the Treatment of Androgenetic Alopecia, with Special Emphasis on Rosemary Oil. doi:10.2147/CCID.S470989 PubMed
- [10] Aditya K Gupta et al.. Dermatol Ther. 2022. Natural products for male androgenetic alopecia. doi:10.1111/dth.15323 PubMed
- [11] Nneamaka Ezekwe et al.. J Clin Aesthet Dermatol. 2020. The Use of Natural Ingredients in the Treatment of Alopecias with an Emphasis on Central Centrifugal Cicatricial Alopecia: A Systematic … PubMed
- [12] Maria Yusuf Dhariwala et al.. J Cosmet Dermatol. 2019. An overview of herbal alternatives in androgenetic alopecia. doi:10.1111/jocd.12930 PubMed
- [13] Yunes Panahi et al.. Skinmed. 2015. Rosemary oil vs minoxidil 2% for the treatment of androgenetic alopecia: a randomized comparative trial. PubMed
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