Saw Palmetto for Androgenetic Alopecia
ABased on 22 studies (2 meta-analyses, 4 RCTs) with 2,123 total participants. 20/22 studies show positive effects.
<\/script>\n`;
},
get iframeSnippet() {
const domain = 'haircited.com';
const params = 'ingredient\u003Dsaw\u002Dpalmetto\u0026condition\u003Dandrogenetic\u002Dalopecia';
return ``;
},
get activeSnippet() {
return this.method === 'script' ? this.scriptSnippet : this.iframeSnippet;
},
copySnippet() {
navigator.clipboard.writeText(this.activeSnippet).then(() => {
this.copied = true;
setTimeout(() => { this.copied = false; }, 2000);
});
}
}"
@keydown.escape.window="open = false"
@click.outside="open = false">
A
The Bottom Line
Saw palmetto is well-supported by clinical research as a natural supplement that may help slow hair loss and support regrowth in androgenetic alopecia by naturally inhibiting DHT production.
- 95% of studies (20/21) show positive effects, including 4 RCTs and 2 meta-analyses
- Works as a natural 5-alpha reductase inhibitor, reducing DHT levels
- Both oral supplementation and topical application have demonstrated benefits
- Generally well-tolerated, though less potent than prescription finasteride
Key Study Findings
Review
The Over-The-Counter Finasteride Alternative: A Critical Review of Saw Palmetto's Efficacy, Safety, and Regulatory Concerns.
Dose: None
vs: None
Outcome: None
Effect: None
None
Population: None
RCT
n=80
24 weeks
Double-blind
Oral Supplementation with l-Cystine, Serenoa repens, Cucurbita pepo, and Pygeum africanum in Chronic Telogen Effluvium …
Dose: 1 capsule daily (l-Cystine, Serenoa repens, Cucurbita pepo, Pygeum africanum, vitamins, micronutrien
vs: Placebo
Effect: MD=+12.3 hairs/cm2 at 6 months
p<0.05
narrative review
Addressing the Root Causes of Female Hair Loss and Non-Pharmaceutical Interventions.
Dose: None
vs: Placebo
Effect: None
None
narrative review
Herbal Remedies for Hair Loss: A Review of Efficacy and Safety.
Dose: varies by remedy and study
vs: Placebo
Effect: None
None
systematic review
n=1658
Double-blind
Effects of dietary supplements on androgenetic alopecia: a systematic review and network meta-analysis.
Dose: various dietary supplements (Nutrafol, apple extract, tocotrienols, pumpkin seed oil, Cistanche/Lami
vs: Placebo
Effect: None
None
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
Effect: Considerable improvements in one or more parameters across 13 included studies
None
Key Statistics
22
Studies
2123
Participants
↑
Positive
A
Grade
Referenced Papers
International journal of …
2026
1 citations
Skin appendage disorders
2025
7 citations
Skin appendage disorders
2025
3 citations
Frontiers in bioinformatics
2025
2 citations
International journal of …
2025
1 citations
Skin appendage disorders
2025
1 citations
Effects of dietary supplements on androgenetic alopecia: a systematic review and network meta-analysis.
Systematic Review
Frontiers in nutrition
2025
Journal of drugs …
2025
Proceedings (Baylor University. …
2024
14 citations
Expert opinion on …
2024
8 citations
Clinical, cosmetic and …
2024
7 citations
Cureus
2023
9 citations
Real-World, Open-Label Study of the Efficacy and Safety of a Novel Serum in Androgenetic Alopecia.
Other
Journal of drugs …
2023
8 citations
Clinical, cosmetic and …
2023
8 citations
Dermatologic therapy
2022
41 citations
Expert opinion on …
2020
147 citations
Archives of dermatological …
2020
51 citations
Skin appendage disorders
2020
24 citations
Journal of cosmetic …
2019
100 citations
International journal of …
2012
69 citations
Evidence-based complementary and …
2011
27 citations
The Australasian journal …
2002
20 citations
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 320 mg/day
- hairloss:
- 320 mg/day standardized extract
Upper limit: Not established
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| None | -- | Neutral | -- |
| 1 capsule daily (l-Cystine, Serenoa repens, Cucurbita pepo, Pygeum africanum, vitamins, micronutrien | 24 weeks | Positive | 80 |
| None | -- | Positive | -- |
| varies by remedy and study | -- | Positive | -- |
| various dietary supplements (Nutrafol, apple extract, tocotrienols, pumpkin seed oil, Cistanche/Lami | -- | Positive | 1658 |
| Various non-prescription agents: procyanidin, cetirizine, caffeine, Oryza sativa bran, pumpkin seed | -- | Positive | -- |
| None | -- | Positive | -- |
| USPlus DERM (lipidosterolic extract of Serenoa repens) at 0.4 and 10 μg/mL in hair follicle organ cu | -- | Positive | -- |
Best taken: With meals to reduce gastrointestinal side effects
Safety & Side Effects
Reported Side Effects
- ⚠ Mild gastrointestinal upset (nausea, diarrhea)
- ⚠ Headache
- ⚠ Dizziness
- ⚠ Rare: decreased libido
Known Interactions
- ● 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)
Tolerable upper intake: Not established
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Saw Palmetto help with Androgenetic Alopecia?
Based on 22 studies with 2,123 participants, there is strong evidence from multiple clinical trials that Saw Palmetto may support Androgenetic Alopecia management. Our evidence grade is A (Strong Evidence).
How much Saw Palmetto should I take for Androgenetic Alopecia?
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 Saw Palmetto?
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 Saw Palmetto and Androgenetic Alopecia?
We rate the evidence as Grade A (Strong Evidence). This rating is based on 22 peer-reviewed studies with 2,123 total participants. The overall direction of effect is positive.
Related Evidence
Other ingredients for Androgenetic Alopecia
Saw Palmetto for other conditions
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.