Tongkat ali
Eurycoma longifolia
Tongkat Ali — the Malaysian root whose quassinoids free bound testosterone into circulation; human trials show improved androgen status and sperm quality.
What the evidence shows
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Eurycoma root, Malaysia's bitter jungle tonic. Its quassinoids loosen the protein that binds testosterone, freeing more of the hormone into circulation.
Stress down and vitality up on one axis: it normalizes cortisol while supporting testosterone. In a placebo-controlled trial in moderately stressed adults, tension, anger and confusion eased and cortisol fell 16%.
Eurycoma restores androgen tone against anti-androgenic EDCs: a meta-analysis of controlled trials found a large increase in testosterone, directly opposing the AR blockade phthalates and BPA impose.
A Malaysian root dug from trees that take a decade to be worth digging, and traditionally simmered for hours rather than taken quickly.
Pooled across five randomized trials, tongkat ali significantly raised men's total testosterone.
Isolated Leydig cells: eurycomanone raised testosterone dose-dependently, acting by inhibiting aromatase conversion of testosterone to estrogen and by phosphodiesterase inhibition, confirmed by molecular docking.
Measured in people: in a placebo-controlled trial cortisol fell 16%, with improvements in tension, anger and confusion. It calms the stress axis and normalizes testosterone. In mice the anti-anxiety effect matched diazepam. Animal safety testing found no adverse effect at the highest dose tested.
Tongkat Ali — the Malaysian root whose quassinoids free bound testosterone into circulation; human trials show improved androgen status and sperm quality.
Where it appears
6 blend pages carry this ingredient. Open it and you will find this ingredient in the list.
- Gainz (Muscle, Strength & Recovery)
- Male Fertility (Seminal Quality)
- Nebula (Warrior Mode Rocket Fuel)
- Obesogen Blocker (Endocrine Disruptor Defense)
- Thunder (Erectile Performance)
- Trinity (Mind Body Spirit Harmonizer)