Saw Palmetto
A supporting extract for urinary comfort and androgen-related balance.
Saw Palmetto (Serenoa repens) is a small palm native to the southeastern United States, with a range extending into parts of Central and South America. The plant produces small black drupes that are harvested, dried and processed into extracts; primary constituents include free fatty acids and their esters (notably lauric and myristic acids), phytosterols and aliphatic alcohols.
Fruit extracts are widely used in dietary supplements for lower urinary tract symptoms associated with benign prostatic enlargement and for conditions linked to dihydrotestosterone activity, such as androgenic hair loss and oily skin. Research indicates saw palmetto may inhibit 5α‑reductase and affect sebum production, but effects and quality of evidence vary; individual responses differ and benefits are not guaranteed. The herb is generally well tolerated, with occasional gastrointestinal complaints and rare reports of gynecomastia; commonly studied dosing is about 160 mg twice daily, though individual needs and safety considerations should be evaluated with a healthcare professional.
At a Glance
Saw palmetto is a small fan palm whose ripe drupes are harvested, dried and processed into concentrated extracts used in dietary supplements.
The fruit extracts are rich in free fatty acids, fatty acid esters and phytosterols and are commonly used in products for urinary and androgen-related concerns.
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| Scientific name | Serenoa repens (syn. Sabal serrulata) |
| Plant family | Arecaceae |
| Origin | Southeastern United States and Central and South America |
| Parts used | Fruits (drupes) |
| Active compounds |
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| Main benefits |
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Origin & History
Saw palmetto is native to the coastal southeastern United States and extends into parts of Central and South America. The plant typically grows in dense colonies on dry, sandy soils and tolerates coastal conditions but is not frost-hardy.
Indigenous peoples traditionally consumed the ripe drupes, drying and preserving them for year‑round use, and applied the fruit in folk remedies for urogenital concerns and other ailments. Indigenous communities dried and stored the fruit as a staple and used it in treatments for urinary and reproductive complaints. Interest in its medicinal uses spread into Western herbal practice during the past century, and fruit extracts are now commonly used in contemporary dietary supplements.
Composition & Active Compounds
Saw palmetto is a small palm with fan‑shaped leaves and a single or creeping stem; the ripe fruit are small, black, olive‑sized drupes that are harvested, dried and processed into powder or concentrated extracts. The drupes contain a complex mixture of lipophilic constituents—predominantly free fatty acids and their esters—alongside phytosterols and aliphatic alcohols, which are considered the primary active components and are implicated in the herb’s biological activity.
The dried fruit (drupes) is the part most used in supplements, and lauric and myristic acids are among the most notable active fatty acids.
- Free fatty acids and fatty acid esters: major lipophilic constituents
- Lauric acid: medium‑chain saturated fatty acid
- Myristic acid: saturated fatty acid associated with bioactivity
- Oleic acid: monounsaturated fatty acid
- Linoleic acid: omega‑6 polyunsaturated fatty acid
- Linolenic acid: omega‑3 polyunsaturated fatty acid
- Palmitic acid: common saturated fatty acid
- Palmitoleic acid: monounsaturated fatty acid
- Caproic acid: short‑chain fatty acid
- Caprylic acid: medium‑chain fatty acid
- Stearic acid: long‑chain saturated fatty acid
- Phytosterols: plant sterols that may affect hormone‑related pathways
- Aliphatic alcohols: long‑chain alcohols present in the lipid fraction
Related Herbs
Properties & Effects
Saw palmetto is traditionally known for use in urogenital and androgen-related concerns and has a long history in folk medicine for a range of urinary and respiratory complaints.
The most well-documented use is for support of lower urinary tract symptoms associated with benign prostatic enlargement.
- Benign prostatic hyperplasia (BPH) support: Research suggests saw palmetto may support lower urinary tract symptoms related to prostate enlargement.
- Androgenic hair loss: Saw palmetto may help reduce progression of hair thinning associated with androgenic hair loss.
- Hirsutism: It may help reduce unwanted hair growth in areas sensitive to hormonal effects.
- Oily skin and acne: The herb may help moderate excess sebum production and related skin oiliness.
- Diuretic (traditional use): Traditionally used to promote urine flow and fluid balance.
- Expectorant (traditional use): Historically applied to support expectoration and ease cough symptoms.
- Sedative (traditional use): Used in folk practice for mild calming effects.
Dosage & How to Use
Recommended supplemental dosing commonly reported in the literature is a measured extract taken twice daily.
| Benign prostatic hyperplasia |
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Safety, Side Effects & Contraindications
People considering saw palmetto should consult a healthcare professional before use if they have existing medical conditions or are taking medications, especially those that affect hormones or prostate health; research indicates saw palmetto extracts can influence androgen‑related pathways. Caution is advised for anyone with a history of breast tissue changes or hormone‑sensitive conditions, and for those unsure about potential interactions with prescription drugs.
Saw palmetto fruit is generally well tolerated, with reported adverse effects mainly involving the gastrointestinal tract such as nausea and heartburn. Rare cases of gynecomastia have been reported and resolved after stopping the herb; if unexpected symptoms occur, discontinue use and seek medical advice. The provided facts do not list specific drug interactions, so discuss concurrent medication use with a clinician.
May affect hormone-related pathways and interact with medications; consult a healthcare professional before use, especially if you have hormone-sensitive conditions or take prescription drugs.