Tongkat Ali: testosterone, libido and level of evidence
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Tongkat Ali: testosterone, libido and level of evidence
Short answer: Tongkat Ali (Eurycoma longifolia) is a Southeast Asian root traditionally associated with male vitality. A systematic review and meta-analysis of clinical trials suggests a possible effect on total testosterone in some men, particularly when baseline levels are low. This does not justify presenting it as a hormonal treatment or a universal “booster.”
What is Tongkat Ali?
Eurycoma longifolia grows notably in Malaysia and Indonesia. The root is traditionally used as a tonic. Modern extracts are often standardized for eurycomanone or according to an extraction ratio.
Tongkat Ali and testosterone
A meta-analysis published in 2022 included nine studies, five of which were randomized trials in the quantitative analysis. It found an average increase in total testosterone, with a particularly interesting signal in men with hypogonadism. The authors nevertheless emphasize that more research is needed before it can be considered a standard clinical option.
The result should therefore not be extrapolated to all men, all extracts or all doses.
Tongkat Ali and libido
Traditional use of Tongkat Ali is closely associated with sexual vitality. Trials have explored libido, sexual function and some fertility parameters, but the evidence is less consistent than for total testosterone.
Stress, cortisol and energy
Some studies have explored markers related to stress or well-being, but it would be excessive to present Tongkat Ali as a “cortisol regulator.” For an ingredient more extensively studied in relation to stress, see our Ashwagandha guide.
How to choose an extract
- botanical name Eurycoma longifolia;
- root as the raw material;
- standardization or extraction ratio clearly explained;
- heavy metal and contaminant analyses;
- identifiable manufacturer and transparent dosage.
A very high eurycomanone percentage is not, by itself, a guarantee of safety or efficacy.
Dosage and duration
Studies use different preparations and doses. There is no universal rule requiring an eight-week course, a “five days on, two days off” schedule or fixed breaks. Follow the product instructions and ask for advice if in doubt.
Tongkat Ali or Shilajit?
Both ingredients have been studied for certain male hormonal parameters, but the data are not interchangeable. See Shilajit and testosterone for the evidence specific to Shilajit.
Precautions
Caution is advised with hormonal treatment, chronic disease, cardiovascular disorders, pregnancy or breastfeeding. Long-term safety data are less robust than for common foods. Avoid products with unclear origin or analyses.
FAQ
Does Tongkat Ali increase testosterone?
A meta-analysis suggests a possible effect, especially in some men with low baseline levels. This does not guarantee an individual effect.
Is it a treatment for hypogonadism?
No. Hypogonadism should be diagnosed and managed medically.
Should it be taken in the morning?
There is no universal clinical rule. Some people prefer taking it earlier in the day depending on tolerance.
Key takeaway
Tongkat Ali has an interesting clinical signal for testosterone, but its image as a “male booster” should be tempered by the variability of extracts, studied populations and safety questions.
