Tongkat Ali

Also known as: Eurycoma longifolia, longjack, Physta, tongkat

Confidence

research strength

CLimited confidence585 studies referenced

Latest evidence update: 2024-06-01

Strongest in Consistency (95). Held back by Recency (16).

Study quality (37%)

Study design (21%)

Risk of bias (16%)

Mostly meta-analyses and well-designed RCTs.

Replication (26%)

Cross-study replication (21%)

Precision (5%)

Some independent replication, statistical precision uneven.

Sample size (16%)

Small combined sample; treat as preliminary.

Consistency (11%)

Studies agree on direction of effect.

Recency (10%)

Mostly pre-2020 research; updates may be needed.

Effect by outcome

how big the change is

No quantified outcomes yet. Once we have studies with measurable endpoints, you will see per-outcome magnitude here.

Directional evidence

Areas where research points to a consistent direction of effect. The strength of evidence is graded; the size of the effect is not quantified.

Hormonal health Stress management

Common dosage

200 to 400 mg of a standardized water extract (such as Physta) daily. Testosterone and stress effects build over 2 to 12 weeks.

Description

Tongkat Ali (Eurycoma longifolia) is a Southeast Asian root extract studied mainly for raising total testosterone in men, with the clearest benefit in older or hypogonadal men. It is also researched for stress, mood, and physical performance.

Safety & interactions

Well tolerated in trials lasting up to several months. Long-term safety is less established. May affect hormone-sensitive conditions, so discuss with a clinician if you take hormone therapy.

Check interactions with other supplements→

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Order Tongkat Ali

Recommended: 200 to 400 mg of a standardized water extract (such as Physta) daily. Testosterone and stress effects build over 2 to 12 weeks.

Questions about Tongkat Ali

Who should avoid Tongkat Ali based on the safety notes?

What dose did studies use for Tongkat Ali, and when was it taken?

What kinds of studies back Tongkat Ali?

Referenced studies (5)

ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.