Benefits
Healthy testosterone
Tongkat Ali is studied for supporting healthy testosterone levels, including free testosterone, in men and women.
Energy and vitality
Tongkat Ali is traditionally used and studied for supporting energy, stamina, and resistance to fatigue and stress.
Male sexual health
In a 6-month randomized trial in aging men with low testosterone, Tongkat Ali with exercise supported erectile function and testosterone.
Mechanism of action
Free-testosterone release
Tongkat Ali compounds are thought to free testosterone from its binding protein (SHBG), raising the active, free fraction.
Stress-hormone balance
Tongkat Ali is studied for lowering cortisol and improving the testosterone-to-cortisol ratio, supporting vitality.
Clinical trials
Six-month double-blind placebo-controlled randomized trial of Eurycoma longifolia (Tongkat Ali) with training on erectile function and testosterone in androgen-deficient aging men. (Leitão et al. 2021, Maturitas)
Aging men with androgen deficiency.
Tongkat Ali with concurrent training supported erectile function and testosterone versus placebo.