Saw Palmetto
Also known as cabbage palm, sabal palm, saw palmetto, serenoa repens
Key takeaways
- Cochrane reviews of BPH treatment found that Saw Palmetto did not show a significant clinical benefit over placebo (PMID: 19370565, PMID: 23235581).
- A large-scale network meta-analysis evaluated its efficacy against alpha-blockers for LUTS (PMID: 31952967).
- A non-inferiority study compared a combination of Saw Palmetto, selenium, and lycopene against tadalafil for BPH (PMID: 29569389).
What the research shows
AI-synthesized from 35 peer-reviewed sources · Updated 2025
Saw Palmetto (Serenoa repens) is a botanical supplement primarily used to manage lower urinary tract symptoms (LUTS) associated with benign prostatic hyperplasia (BPH). While some meta-analyses suggest benefit, high-quality Cochrane reviews indicate that it may not be significantly more effective than placebo for BPH.
By condition
Benign Prostatic Hyperplasia (BPH) / LUTS
Moderate
Multiple meta-analyses show varying results, with some suggesting efficacy in reducing urinary symptoms, while Cochrane reviews find insufficient evidence to prove superiority over placebo.
Androgenetic Alopecia
Weak
Recent systematic reviews have explored its use for hair loss, but evidence remains limited compared to BPH research.
Male Infertility
Insufficient
Research is limited to systematic reviews exploring its potential role as a non-hormonal treatment.
Effective doses
Specific dose ranges were not detailed in the provided abstracts, though Permixon is cited as a common standardized extract used in clinical trials.
Safety & interactions
Generally considered safe; however, users should consult a provider regarding potential interactions with hormonal therapies or blood thinners.
Limitations
There is significant heterogeneity in study results, with a conflict between industry-funded meta-analyses and independent Cochrane reviews. Many studies lack long-term follow-up and standardized dosing.
Top-rated Saw Palmetto products
Ranked by safety score and evidence coverage
Drug–supplement interactions
33 documented interactions
| Drug | Severity | Mechanism | Evidence |
|---|---|---|---|
| Antiarrhythmics | Critical | Saw Palmetto is a weak inhibitor of CYP2C9, which decreases metabolism of CYP2C9 | cyp-inferred |
| Anticonvulsants | Critical | Saw Palmetto is a weak inhibitor of CYP3A4, which decreases metabolism of CYP3A4 | cyp-inferred |
| GI Prokinetics | Critical | Saw Palmetto is a weak inhibitor of CYP3A4, which decreases metabolism of CYP3A4 | cyp-inferred |
| Immunosuppressants | Critical | Saw Palmetto is a weak inhibitor of CYP3A4, which decreases metabolism of CYP3A4 | cyp-inferred |
| Theophylline | Critical | Saw Palmetto is a weak inhibitor of CYP3A4, which decreases metabolism of CYP3A4 | cyp-inferred |
| Warfarin | Critical | Saw Palmetto is a weak inhibitor of CYP3A4, which decreases metabolism of CYP3A4 | cyp-inferred |
| ADHD Medications | Moderate | Saw Palmetto is a weak inhibitor of CYP2D6, which decreases metabolism of CYP2D6 | cyp-inferred |
| ARB | Moderate | Saw Palmetto is a weak inhibitor of CYP2C9, which decreases metabolism of CYP2C9 | cyp-inferred |
| Antibiotics | Moderate | Saw Palmetto is a weak inhibitor of CYP3A4, which decreases metabolism of CYP3A4 | cyp-inferred |
| Antidiabetic Drugs | Moderate | Saw Palmetto is a weak inhibitor of CYP3A4, which decreases metabolism of CYP3A4 | cyp-inferred |
How it's sold
Data aggregated from 451 product labels
Research evidence
Showing top 10 of 35 sources, sorted by quality
**Tacklind et al., 2009** | Cochrane Database Syst Rev | Meta Analysis Tacklind James, MacDonald Roderick, ... Wilt Timothy J. Serenoa repens for benign prostatic hyperplasia. Cochrane Database Syst Rev. 2009-Apr-15(2):CD001423. doi:10.1002…
**Tacklind et al., 2012** | Cochrane Database Syst Rev | Meta Analysis Tacklind James, Macdonald Roderick, ... Wilt Timothy J. Serenoa repens for benign prostatic hyperplasia. Cochrane Database Syst Rev. 2012-Dec-12;12(12):CD001423. doi:10.…
PURPOSE: To assess the effects of Serenoa repens alone or in combination with other phytotherapy compared to placebo in men with LUTS due to benign prostatic enlargement. MATERIALS AND METHODS: Following a registered protocol (CRD4202122665…
CONTEXT: International guidelines do not make any specific recommendations on Serenoa repens (SeR) for the treatment of male lower urinary tract symptoms (LUTS) secondary to benign prostatic enlargement (BPE), due to product heterogeneity a…
**Cannarella et al., 2019** | Eur Rev Med Pharmacol Sci | Systematic Review Cannarella R, Calogero A E, ... La Vignera S. Non-hormonal treatment for male infertility: the potential role of Serenoa repens, selenium and lycopene. Eur Rev Med …
**Cai et al., 2020** | Am J Mens Health | Meta Analysis Cai Tong, Cui Yuanshan, ... Gao Zhenli. Comparison of Serenoa repens With Tamsulosin in the Treatment of Benign Prostatic Hyperplasia: A Systematic Review and Meta-Analysis. Am J Mens …
UNLABELLED: What's known on the subject? and What does the study add? For the past 30 years Serenoa repens has become a widely used phytotherapy in the USA and in Europe, mostly because of positive comparisons to α-blockers and 5α-reductase…
**Zhou et al., 2025** | Front Nutr | Systematic Review Zhou Lei, Zhu Wenkang, Chen Yan. Effects of dietary supplements on androgenetic alopecia: a systematic review and network meta-analysis. Front Nutr. 2025;12:1719711. doi:10.3389/fnut.20…
**Das et al., 2019** | Clin Nutr ESPEN | Systematic Review Das K, Buchholz N. Benign prostate hyperplasia and nutrition. Clin Nutr ESPEN. 2019-Oct;33:5-11. doi:10.1016/j.clnesp.2019.07.015 BACKGROUND: and aims: Benign Prostatic hyperplasia …
**Sosnowska et al., 2009** | J Ethnobiol Ethnomed | Meta Analysis Sosnowska Joanna, Balslev Henrik. American palm ethnomedicine: a meta-analysis. J Ethnobiol Ethnomed. 2009-Dec-24;5:43. doi:10.1186/1746-4269-5-43 BACKGROUND: Many recent pap…
Frequently asked questions
What is Saw Palmetto and what is it used for?
Saw Palmetto (Serenoa repens) is a botanical supplement primarily used to manage lower urinary tract symptoms (LUTS) associated with benign prostatic hyperplasia (BPH). It has also been explored for hair loss and male infertility, though evidence for these uses is limited.
Does Saw Palmetto work for BPH or urinary symptoms?
Research on Saw Palmetto for BPH is mixed. While some meta-analyses suggest it may help reduce urinary symptoms, high-quality Cochrane reviews indicate that it may not be significantly more effective than a placebo. Therefore, the evidence for its superiority over placebo is considered moderate but conflicting.
Is Saw Palmetto effective for hair loss?
Evidence for using Saw Palmetto for androgenetic alopecia (hair loss) is weak. Recent systematic reviews have explored this use, but the research remains limited compared to the studies conducted for BPH. Consumers should not expect proven results for hair regrowth.
What is the effective dose of Saw Palmetto?
Specific dose ranges were not detailed in the provided evidence summary. However, clinical trials often cite Permixon as a common standardized extract used in research. You should consult a healthcare provider to determine an appropriate dosage, as specific recommendations are not available in the current data.
Is Saw Palmetto safe to take with blood thinners?
Saw Palmetto may have mild antiplatelet properties, which could potentially increase the risk of bleeding when taken with anticoagulants. Although the evidence for this interaction is weak, users should consult a provider regarding potential interactions with blood thinners before use.
Can Saw Palmetto interact with hormonal medications?
Yes, Saw Palmetto has antiandrogenic properties that may have an additive effect with antiandrogen drugs like finasteride or flutamide. This interaction is considered minor, but users on hormonal therapies should consult their healthcare provider to manage potential effects.
Who should avoid taking Saw Palmetto?
Individuals on hormonal therapies or blood thinners should consult a provider before use due to potential interactions. Additionally, because research on its safety and efficacy for conditions like male infertility is insufficient, it is not recommended as a proven treatment for these issues without medical guidance.