Hormonal/Mood/Performance

Tongkat Ali

Southeast Asian root extract that may raise testosterone and lower stress in men with low-normal levels or stress-related sexual symptoms.

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evidence

Caution

risk

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Overview

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Quick Take

Best for stressed men with low libido or low-normal testosterone; expect modest effects, not TRT-level changes.

Tongkat ali is a root extract from Eurycoma longifolia, a Southeast Asian medicinal shrub; there is no meaningful food source. Its quassinoids, especially eurycomanone, may support testicular steroidogenesis, reduce SHBG-bound testosterone, and blunt stress-related cortisol output. Human studies suggest modest benefits for testosterone in men with low baseline levels, stress/mood, and sexual function, with weaker evidence for semen quality, fatigue, and body composition. It fits best middle-aged men with low libido, high stress, or low-normal testosterone symptoms.

Potential benefits

Improves testosterone in low-T men

Reduces stress and cortisol

May improve sexual function

May support semen quality

May reduce fatigue

May support lean mass

Protocol

Amount

200-400 mg

Frequency

Once daily

When

Morning or early afternoon with food; avoid late evening if it makes you restless.

Onset Time

2-4 weeks for stress/libido; 6-12 weeks for hormone changes.

Who Should Consider

Men with low-normal testosterone symptoms

Middle-aged men with reduced libido

Adults under chronic psychological stress

Men with fatigue plus sexual symptoms

How It Works

Tongkat ali contains quassinoids such as eurycomanone that may support Leydig-cell testosterone production and shift more testosterone into the free, unbound fraction by affecting SHBG. It may also influence the hypothalamic-pituitary-adrenal axis, which can modestly reduce cortisol responses to stress in some users.

Updated 5/19/2026