Herbs

Olive leaf extract

Also called: oleuropein

Extract of olive tree leaves.

Why people take it
Blood pressure, immunity.
What the evidence says
Small studies on blood pressure.
How it is usually taken
Usually 500 to 1,000 mg a day.
Be careful
May add to blood pressure and diabetes medicines.
Medicines it can interact with
May add to blood pressure and diabetes medicines.

Other herbs

EchinaceaElderberryGarlic extractGingerPeppermint oilMilk thistleSaw palmettoSt John's wortValerianChamomileLemon balmPassionflowerKavaRhodiolaGinkgoMoringaFenugreekCinnamonBlack seedLicorice

Common questions

What is Olive leaf extract?

Extract of olive tree leaves.

Why do people take Olive leaf extract?

Blood pressure, immunity.

Does Olive leaf extract work?

Small studies on blood pressure.

How much Olive leaf extract do people take?

Usually 500 to 1,000 mg a day.

Is Olive leaf extract safe?

May add to blood pressure and diabetes medicines.

Does Olive leaf extract interact with medicines?

May add to blood pressure and diabetes medicines.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

🔎 Search all supplements

For information only, not medical advice. Supplements are not medicines: they are not tested and approved like drugs before they are sold, and they can interact with medicines. Talk to your doctor or pharmacist before you start one, especially if you are pregnant or breastfeeding, take regular medicines, or have kidney, liver or heart disease.