Herbs

Tongkat ali

Also called: longjack, eurycoma longifolia

A Southeast Asian root.

Why people take it
Testosterone, libido.
What the evidence says
Small studies suggest modest testosterone effects in men with low levels.
How it is usually taken
Usually 200 to 400 mg of extract a day.
Be careful
Some products have been found contaminated with mercury or prescription drugs.
Medicines it can interact with
May affect hormone treatments; products may be contaminated.

Other herbs

EchinaceaElderberryGarlic extractGingerPeppermint oilMilk thistleSaw palmettoSt John's wortValerianChamomileLemon balmPassionflowerKavaRhodiolaGinkgoMoringaFenugreekCinnamonBlack seedLicorice

Common questions

What is Tongkat ali?

A Southeast Asian root.

Why do people take Tongkat ali?

Testosterone, libido.

Does Tongkat ali work?

Small studies suggest modest testosterone effects in men with low levels.

How much Tongkat ali do people take?

Usually 200 to 400 mg of extract a day.

Is Tongkat ali safe?

Some products have been found contaminated with mercury or prescription drugs.

Does Tongkat ali interact with medicines?

May affect hormone treatments; products may be contaminated.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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