Saw Palmetto
Also known as: Serenoa repens, Sabal Extract
The most studied herbal remedy for benign prostatic hyperplasia (BPH) and male hair loss.
What it is
Saw palmetto is a small palm native to the southeastern United States whose berries have been used medicinally for over a century. It is the most commonly used herbal remedy for benign prostatic hyperplasia (BPH) — the age-related enlargement of the prostate gland that causes urinary symptoms in the majority of men over 50. It also has applications in male pattern hair loss through a shared mechanism with BPH.
How it works
Saw palmetto's lipophilic extract inhibits 5-alpha-reductase (types I and II) — the enzyme that converts testosterone to the more potent dihydrotestosterone (DHT). DHT stimulates prostate cell proliferation and is the primary driver of androgenic hair loss. By reducing DHT activity, saw palmetto may reduce prostate tissue growth and slow hair follicle miniaturization. It also has anti-inflammatory activity in prostate tissue.
Clinical dose range
320 mg lipophilic extract/day
The clinically validated dose is 320 mg/day of a lipophilic (fat-soluble) extract standardized to 80–90% fatty acids and sterols. Most clinical trials use a single 320 mg dose or 160 mg twice daily. Aqueous extracts and generic powders have not demonstrated equivalent clinical activity.
Forms comparison
What to look for on the label
- Specifies lipophilic extract with 80–90% fatty acids content
- 320 mg per serving
- Third-party tested for fatty acid composition
- Not combined with other herbs in a proprietary blend that hides the saw palmetto dose
Health goals supported
Safety & dosing notes
Very well tolerated. Rare GI side effects. May interact with anticoagulants (modest antiplatelet activity). May affect PSA test results — inform physician before prostate cancer screening. Mild hormonal activity — use under medical supervision if on hormone therapy.
SuppsBuddy is very strict about saw palmetto form: only lipophilic extracts with confirmed fatty acid content receive a passing ingredient quality score. Generic saw palmetto powder or aqueous extracts are flagged as clinically unvalidated.
Frequently asked questions
What is Saw Palmetto?
Saw palmetto is a small palm native to the southeastern United States whose berries have been used medicinally for over a century. It is the most commonly used herbal remedy for benign prostatic hyperplasia (BPH) — the age-related enlargement of the prostate gland that causes urinary symptoms in the majority of men over 50. It also has applications in male pattern hair loss through a shared mechanism with BPH.
How does Saw Palmetto work?
Saw palmetto's lipophilic extract inhibits 5-alpha-reductase (types I and II) — the enzyme that converts testosterone to the more potent dihydrotestosterone (DHT). DHT stimulates prostate cell proliferation and is the primary driver of androgenic hair loss. By reducing DHT activity, saw palmetto may reduce prostate tissue growth and slow hair follicle miniaturization. It also has anti-inflammatory activity in prostate tissue.
What is the typical clinical dose range for Saw Palmetto?
320 mg lipophilic extract/day. The clinically validated dose is 320 mg/day of a lipophilic (fat-soluble) extract standardized to 80–90% fatty acids and sterols. Most clinical trials use a single 320 mg dose or 160 mg twice daily. Aqueous extracts and generic powders have not demonstrated equivalent clinical activity.
What forms of Saw Palmetto should I look for?
Lipophilic extract (80–90% fatty acids and sterols): The only form with consistent clinical trial evidence; matches ESCOP and EMA monograph specifications | Permixon® (hexane-extracted lipophilic extract): Most studied branded form; used in all major European clinical trials | Aqueous (water-based) extract: Does not contain the lipophilic fraction responsible for 5-alpha-reductase inhibition
Is Saw Palmetto safe?
Very well tolerated. Rare GI side effects. May interact with anticoagulants (modest antiplatelet activity). May affect PSA test results — inform physician before prostate cancer screening. Mild hormonal activity — use under medical supervision if on hormone therapy. This information is educational and is not medical advice.
How does SuppsBuddy evaluate Saw Palmetto?
SuppsBuddy is very strict about saw palmetto form: only lipophilic extracts with confirmed fatty acid content receive a passing ingredient quality score. Generic saw palmetto powder or aqueous extracts are flagged as clinically unvalidated.
Related ingredients
This page is for educational purposes only. These statements have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before starting any supplement.