Tribulus and Energy: What Can You Expect?
In popular literature, Tribulus terrestris has been described as a powerful energy booster and testosterone enhancer. But clinical studies paint a more complex picture. Let's examine what tribulus supplementation actually does for energy levels and fatigue.
Tribulus's Role in Energy Metabolism
Tribulus's mechanism of action for energy is not well explained. The main hypothesis is that tribulus steroidal saponins (especially protodioscin) stimulate the release of luteinizing hormone (LH) from the pituitary, which in turn is supposed to stimulate testosterone production. Higher testosterone levels could theoretically improve energy, muscle strength, and reduce feelings of fatigue.
However, this mechanism is contested -- many clinical studies have failed to demonstrate that tribulus supplementation significantly raises testosterone levels in healthy men with normal hormonal profiles.
Clinical Evidence
A meta-analysis from 2019 covering 14 studies found that tribulus supplementation does not significantly increase testosterone levels in healthy men or women (Qureshi et al., 2019). This is a key finding, since most of the energy claims for tribulus rest on the assumption that it raises testosterone.
With regard to energy levels and fatigue directly, there are few well-controlled RCTs. One study found that tribulus supplementation did not improve physical performance compared with placebo in trained athletes (Antonio et al., 2000).
The strongest evidence for tribulus concerns sexual health -- some studies have shown positive effects there, particularly for low libido.
Who May Benefit
Tribulus supplementation may be useful for:
- People looking for an adaptogen-like herbal supplement for general wellbeing (though evidence is weaker than for ashwagandha, for example)
- Sexual health -- there are some positive results in studies
- People with suboptimal testosterone levels (diagnosed by a physician)
For boosting energy in intensively training healthy individuals, tribulus is not a first-choice supplement given the lack of supporting clinical evidence.
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Dose
Studies have used varying doses and extract standardization levels. The most common range is 250 to 1500 mg per day, often divided into multiple doses. Most studies that showed no testosterone effect used 45- to 90-day treatment periods.
On the safety side, tribulus has generally been considered safe for short-term use. Data on long-term use are limited.
Realistic Expectations
Be cautious about extravagant energy claims in tribulus product marketing. Marketplace claims about testosterone enhancement and energy boosting are generally overstated compared with what clinical evidence supports.
If you are looking for an effective adaptogen for fatigue and stress, ashwagandha has a stronger evidence base in this regard.
References
- Qureshi, A., et al. (2019). Tribulus terrestris for sexual function in men: A systematic review and meta-analysis. Maturitas, 112, 6-16.
- Antonio, J., et al. (2000). The effects of Tribulus terrestris on body composition and exercise performance in resistance-trained males. International Journal of Sport Nutrition and Exercise Metabolism, 10(2), 208-215. https://pubmed.ncbi.nlm.nih.gov/10861339/
- Neychev, V., & Mitev, V. (2005). The aphrodisiac herb Tribulus terrestris does not influence the androgen production in young men. Journal of Ethnopharmacology, 101(1-3), 319-323. https://pubmed.ncbi.nlm.nih.gov/15994038/
FAQ
Does tribulus raise testosterone?
Most clinical studies have not found significant testosterone increases in healthy men. Possible positive effects have been documented in men with low testosterone levels.
Can tribulus be taken for a long time?
Short-term use (up to 90 days) is generally considered safe. Data on the safety of long-term use are limited.
When is the best time to take tribulus?
Studies have used varying dosing schedules. It is often recommended to take it with food to avoid digestive discomfort.
