Tongkat Ali
Southeast Asian herb (Eurycoma longifolia); modest evidence for testosterone support & stress reduction in men.
Evidence last reviewed: 04 Apr 2026
Tongkat Ali is a Southeast Asian herb that may modestly support testosterone levels and reduce stress in men. However, its effects can vary, and it may not be suitable for everyone.
May exacerbate anxiety or sleep disruption in sensitive individuals due to mild androgen elevation
Heavy metal (mercury) contamination reported in some Malaysian products — choose third-party tested sources
Summarized study outcomes with population, design, grade, and effect data.
The evidence for Tongkat Ali shows a consistent but modest increase in free testosterone levels and improvements in libido among aging men and those with low testosterone. However, the overall strength of the evidence is moderate, and individual responses may vary.
New outcome— · —Very low
Testosterone / sexual functionAging men; men with late-onset hypogonadism · RCTs (several)Moderate
Consistent but modest free testosterone increase (~15–40%); libido improvements in most trials.
Stacks containing Tongkat Ali
Public community stacks that include this ingredient.
Combining Tongkat Ali with Mucuna Pruriens can support hormonal balance and testosterone levels in men. Tongkat Ali is known for its testosterone-boosting properties, while Mucuna Pruriens supports dopamine production and hormonal balance.
Hormonal Balance for Men
This stack combines tongkat ali & boron to support hormonal balance & enhance libido in men. Tongkat ali is known for its testosterone-boosting effects, while boron supports testosterone metabolism & bone health.