Thomas DeLauer
Tongkat Ali may lower cortisol and raise testosterone in stressed adults, but other claimed mechanisms lack direct scientific validation.
One strong study supports Tongkat Ali’s effect on cortisol and testosterone, but most other mechanisms are unverified or based on indirect evidence.
We checked the science
our breakdown of the video
10 claims, each mapped to its moment in the video
Taking Tongkat Ali supplements lowers cortisol and raises free testosterone in adults experiencing stress.
Multiple causal studies (randomized trials and reviews) support this claim.
Higher levels of the stress hormone cortisol reduce the signal from the hypothalamus that triggers testosterone production.
Weak evidence — fewer than 20 studies, so treat this as a starting point, not a fact.
Higher levels of the stress hormone cortisol cause the pituitary gland to release less luteinizing hormone, which results in lower testosterone production by the testes.
Weak evidence — fewer than 20 studies, so treat this as a starting point, not a fact.
High levels of the stress hormone cortisol reduce testosterone production by Leydig cells in the testes, even when luteinizing hormone is present to stimulate it.
Not enough evidence yet — take this with caution.
Taking Tongkat Ali supplements lowers the level of sex hormone-binding globulin in the blood, resulting in a higher percentage of testosterone that is not bound and available for biological activity.
Good evidence supports this claim, with little to contradict it.
Tongkat Ali reduces the conversion of testosterone into estradiol by inhibiting the aromatase enzyme.
Not enough evidence yet — take this with caution.
Zinc is required for the body to convert testosterone into dihydrotestosterone, and low zinc levels reduce this conversion.
Weak evidence — fewer than 20 studies, so treat this as a starting point, not a fact.
Zinc from whole foods like pumpkin seeds leads to higher levels of bioavailable zinc and greater conversion of testosterone to dihydrotestosterone compared to zinc supplements.
Not enough evidence yet — take this with caution.
Higher dietary magnesium intake is linked to lower levels of sex hormone-binding globulin and higher levels of free testosterone in the blood.
Not enough evidence yet — take this with caution.
When cortisol levels are artificially lowered during their natural morning peak, the body's internal clock becomes disrupted.
Shows a real connection between these things — genuine evidence, though it can't prove cause and effect, and stronger studies could still change it.
Key Takeaways
Summary
Based on the video transcript only.
- 1Cortisol blocks testosterone production at three points in the body, and Tongkat Ali reduces cortisol, freeing up testosterone production.
- 2Tongkat Ali also reduces SHBG (which locks up testosterone) and blocks aromatase (which turns testosterone into estrogen), making more testosterone available.
- 3Pumpkin seeds provide zinc, which helps convert testosterone into DHT—the stronger form that drives energy and muscle—and magnesium, which further reduces SHBG.
- 4Taking 200 mg of Tongkat Ali daily for 4 weeks raised free testosterone by 37% and lowered cortisol by 16% in stressed adults.
- 5Liposomal Tongkat Ali delivers the compound more effectively into cells, and pumpkin seeds can be eaten anytime to support the effect.
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