Herbs

Saw palmetto

Also called: serenoa

Extract of the berries of a palm tree.

Why people take it
Enlarged prostate, hair loss.
What the evidence says
Large trials found it no better than placebo for prostate symptoms.
How it is usually taken
Usually 320 mg a day of extract.
Be careful
Mild stomach upset. Tell your doctor before prostate tests.
Medicines it can interact with
May add to bleeding risk with blood thinners; may affect hormone medicines and the pill.

Other herbs

EchinaceaElderberryGarlic extractGingerPeppermint oilMilk thistleSt John's wortValerianChamomileLemon balmPassionflowerKavaRhodiolaGinkgoMoringaFenugreekCinnamonBlack seedLicoriceBoswellia

Common questions

What is Saw palmetto?

Extract of the berries of a palm tree.

Why do people take Saw palmetto?

Enlarged prostate, hair loss.

Does Saw palmetto work?

Large trials found it no better than placebo for prostate symptoms.

How much Saw palmetto do people take?

Usually 320 mg a day of extract.

Is Saw palmetto safe?

Mild stomach upset. Tell your doctor before prostate tests.

Does Saw palmetto interact with medicines?

May add to bleeding risk with blood thinners; may affect hormone medicines and the pill.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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