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Best saw palmetto supplement: what the research really shows

By the Life in Good Form editors. Updated 2026-10-15.

We research products from makers' specs and health sources; we do not run hands-on tests. Links to Amazon may earn us a commission at no cost to you. How this works.

Quick answerSaw palmetto is sold mainly for urinary symptoms from an enlarged prostate (BPH) and for hair loss. The NCCIH says many studies show it is probably not helpful for BPH symptoms: a 2023 review of 27 studies found little or no benefit when taken alone, and two NIH-funded trials, one up to three times the usual dose, showed no improvement. Evidence for hair loss is too limited. It is well tolerated, used safely for up to 3 years, and does not appear to affect PSA readings. See a doctor about urinary symptoms before relying on a supplement.
Our picks at a glance
  • Saw palmetto berry extract, 320 mg softgel. Best for: Men who have talked with their doctor and still want to try saw palmetto. See options on Amazon
  • Saw palmetto berry powder capsules. Best for: People who prefer whole berry rather than extract. See options on Amazon
  • Saw palmetto with pygeum. Best for: Buyers specifically looking for a combination prostate formula. See options on Amazon

Compare the picks and what to watch out for

What saw palmetto is

Saw palmetto (Serenoa repens) is a small tree, 6 to 10 feet tall, native to the West Indies and the southeast coast of North America. The National Center for Complementary and Integrative Health (NCCIH) says its berries are used for health purposes.

It is promoted for urinary symptoms of an enlarged prostate (benign prostatic hyperplasia, or BPH), male pattern baldness, chronic prostatitis or chronic pelvic pain syndrome, and other conditions.

What the research shows

UseWhat NCCIH reports
Enlarged prostate (BPH) symptomsProbably not helpful
Chronic prostatitis / pelvic painNo significant benefit in a 2022 review
Male pattern hair lossToo little evidence

BPH. A 2023 review of 27 studies found saw palmetto alone provides little or no benefit for BPH symptoms. It included two NIH-funded trials: one at a standard dose and one with increasing doses up to three times the usual amount. Neither improved symptoms. Products made with hexane extraction, once thought to work better, performed no differently. Conclusions could not be drawn about herb combinations that include saw palmetto.

Prostatitis. A 2022 review of five studies found no significant benefit.

Hair loss. A few small studies have tested saw palmetto by mouth or on the scalp, but the evidence is too limited for conclusions.

Safety

Why see a doctor first

Urinary symptoms such as frequent urination, weak stream or waking at night to urinate can come from an enlarged prostate but also from other conditions. Because NCCIH finds saw palmetto probably does not help BPH symptoms, relying on it could delay effective care. A doctor can confirm the cause and discuss proven treatment options. Hair loss also has several causes worth checking.

If you still want to try it: reading the label

What to look for when you buy

Saw palmetto berry extract, 320 mg softgel

Best for: Men who have talked with their doctor and still want to try saw palmetto

NOW Foods' version lists 320 mg of fatty-acid standardized berry extract with 80 mg pumpkin seed oil in one daily vegetarian softgel.

Watch out: NCCIH says saw palmetto is probably not helpful for BPH symptoms. Do not delay medical care.

See options on Amazon

Saw palmetto berry powder capsules

Best for: People who prefer whole berry rather than extract

NOW Foods gives 1,100 mg of whole saw palmetto berry per 2-capsule serving in cellulose capsules.

Watch out: More capsules per day than extracts. Same limited evidence.

See options on Amazon

Saw palmetto with pygeum

Best for: Buyers specifically looking for a combination prostate formula

Combination products pair saw palmetto with other herbs such as pygeum in one softgel.

Watch out: NCCIH says conclusions could not be reached on herb combinations. Each added herb has its own cautions.

See options on Amazon
When to talk to a doctor: See a doctor about urinary symptoms such as frequent urination, weak stream or blood in urine before using saw palmetto, since it is probably not helpful for enlarged prostate symptoms. Do not use during pregnancy or breastfeeding, and talk with your provider if you take medicines.

Questions people ask

Does saw palmetto work for an enlarged prostate?
Probably not. NCCIH says a 2023 review of 27 studies found little or no benefit for BPH symptoms when taken alone.
Does saw palmetto help hair loss?
Only a few small studies exist, and NCCIH says the evidence is too limited to draw conclusions.
Does saw palmetto affect PSA tests?
It does not appear to affect PSA readings, even at higher-than-usual amounts.
Is saw palmetto safe?
It is well tolerated and has been used safely in studies for up to 3 years. It may be unsafe during pregnancy or breastfeeding.
When is the best time to take saw palmetto?
Follow the label. NOW Foods' extract softgel is taken once daily with a meal.
Is hexane-extracted saw palmetto better?
No. The 2023 review found no difference in BPH symptom effects between hexane-extracted products and others.
Can women take saw palmetto?
Some products are marketed to women for hair, but NCCIH says saw palmetto may be unsafe during pregnancy or breastfeeding, and hair loss evidence is limited. Ask a provider first.
Does saw palmetto help chronic prostatitis?
A 2022 review of five studies found no significant benefit for chronic prostatitis or chronic pelvic pain syndrome.

Sources

Sources checked 2026-10-15.

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