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Saw Palmetto

A plant extract studied for urinary symptoms of benign prostatic hyperplasia.

Supplements

Sexual health

Research records

Historical source snapshot. Not freshly verified, not a recommendation. Study findings, community accounts and app defaults are not interchangeable.

Publication suitability · 2026-10-15: Historical reference only; not a clinical verification. Clinical, regulatory, efficacy, safety and dose claims are not independently established by this review.

Saw Palmetto

A plant extract studied for urinary symptoms of benign prostatic hyperplasia.

Evidence category: Systematic review. This describes the source category, not approval or certainty.

Regulatory statement in source: Not separately recorded; do not infer approval from the evidence category.

Saw palmetto is an extract from the berries of the Serenoa repens palm, widely marketed for lower urinary tract symptoms associated with an enlarged prostate. It is one of the most extensively studied botanical supplements, with dozens of randomized trials conducted over several decades. A Cochrane systematic review pooling this trial evidence found the extract, taken alone, provides little to no benefit over placebo for urinary symptoms or quality of life.

Benefits reported in the imported source

  • Extensively studied in dozens of randomized trials over several decades, giving unusually mature safety data for a botanical supplement
  • Adverse event rates in trials were similar to placebo, indicating good tolerability

Risks and limits

  • The largest pooled analysis available, a Cochrane systematic review, found no meaningful benefit over placebo for urinary symptoms
  • Relying on it in place of evaluated medical treatment for an enlarged prostate risks delaying effective care
  • Mild gastrointestinal upset has been reported in a minority of users

Source bottom line: Saw palmetto is among the best-studied herbal supplements for prostate symptoms, and that scrutiny is exactly what undermines it: the highest-quality pooled evidence finds no real benefit over placebo.

Uncertainty: Reference information only. Not medical advice.

Study protocols — reports, not instructions

4,656 men, mean age 52 to 68, with moderate lower urinary tract symptoms from benign prostatic hyperplasia, pooled across 27 randomized controlled trials

Reported regimen
Saw palmetto extract, most commonly 320 mg per day, alone or combined with other plant extracts, compared with placebo for 3 to 17 months
Duration
Three to seventeen months across the pooled trials
Reported outcome
Saw palmetto alone showed little to no difference from placebo in urinary symptoms or quality of life at both short-term (3 to 6 months) and long-term (12 to 17 months) follow-up, with no significant increase in adverse events.
Source
Serenoa repens for benign prostatic hyperplasia | Cochrane
Claim provenance

evidence.json#/catalog:supplement:saw-palmetto/protocols/0

Community and practice descriptions

Accounts of a practice are not evidence of safety or effectiveness. Words such as “standard”, “safe” or “recommended” describe the source account, not verified consensus or this wiki’s advice. Commercial and self-published citations are retained for traceability, not vendor endorsement or independent clinical corroboration.

Historical research outcome: no-verified-description · 2026-10-06

No suitable community description was independently verified in these checks. The entry remains empty; this does not establish that no practice exists elsewhere.

Pharmacokinetic context

No half-life recorded in this source snapshot. No value has been inferred.

Source references

Snapshot provenance

Source ID: catalog:supplement:saw-palmetto. Commit: adc7684614f9439b41d91a3312b62e7982c7e20e. Review state: historical-not-reverified. Authored links are retained separately from the canonical evidence links in the public data. App templates/defaults and rejected drafts are archived, not deployed.

Related entries and components

None listed.