Saw Palmetto
herbs
Saw Palmetto is a palm tree extract traditionally used to support prostate health and urinary function, particularly in men experiencing benign prostatic hyperplasia (BPH). The supplement contains fatty acids and phytosterols that may help inhibit 5-alpha reductase, an enzyme involved in testosterone metabolism.
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Benefits
Dosage
Typical Dose
160 mg extract twice daily or 320 mg once daily
Upper Limit
320-480 mg daily
Timing
With meals to improve absorption
Forms & Bioavailability
Standardised extract (85-95% fatty acids)
Highest bioavailability; most studied and effective form
Whole berry powder
Lower bioavailability; less concentrated than extracts
Liquid tincture
Good absorption; convenient for dosing adjustments
Side Effects
Interactions
Research Summary
Research on Saw Palmetto for BPH shows mixed results, with some studies demonstrating modest improvement in urinary symptoms comparable to finasteride, whilst others show minimal benefit over placebo. Most evidence supports its use for mild to moderate urinary symptoms rather than severe BPH. Long-term safety appears good, though additional high-quality trials are needed to establish optimal efficacy.
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The Bottom Line on Saw Palmetto
Saw Palmetto is moderately researched with promising but sometimes mixed evidence.It is most commonly used for supports prostate health and promotes healthy urinary flow. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.
About Our Research
This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.
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Goal Guides for Saw Palmetto
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