Chronic stress doesn't just feel bad — it has a measurable hormonal cost. Here's how that connects to daily energy, and what the Tongkat Ali research actually shows.
Cortisol gets talked about as "the stress hormone," but its relationship to energy is more direct than most men realize. Understanding it explains why so many men feel wiped out even when they're getting enough sleep.
Cortisol is part of the body's normal stress response — useful in short bursts. The problem is chronic elevation: ongoing work stress, poor sleep, and overtraining can keep cortisol elevated for extended periods, and that has downstream effects on testosterone, recovery, and how fatigued you feel day to day.
Elevated cortisol and testosterone have an inverse relationship in the body — when one goes up over time, the other tends to come down. That matters because testosterone plays a direct role in energy, motivation, and physical drive.
Tongkat Ali (Eurycoma longifolia), sometimes called Longjack, is one of the more researched botanical ingredients in this space specifically because of its studied relationship with both cortisol and testosterone.
A study published in the Journal of the International Society of Sports Nutrition found Tongkat Ali extract was associated with reduced cortisol levels and improved mood and vigor scores in moderately stressed adults. (Talbott et al., 2013)
A randomized, double-blind trial found men taking Tongkat Ali extract saw a 37% increase in testosterone levels versus placebo after 12 weeks, along with improved physical performance scores. (Tambi et al., Asian Journal of Andrology, 2012)
Workout recovery isn't just about muscle repair — it's also a hormonal process. Elevated cortisol can interfere with recovery and contribute to the "always tired" feeling some men describe even when they're training consistently. Ingredients that help support a healthier cortisol-to-testosterone balance are targeting a real physiological mechanism, not just a marketing story.
Energy that comes from hormone balance builds over weeks. Energy that comes from caffeine disappears in hours. They are not the same thing, and they don't fix the same problem.
Studies showing meaningful cortisol and testosterone effects from Tongkat Ali generally use standardized extract in the 200–400mg/day range. Products that list Tongkat Ali at a fraction of that amount, or bury it in a proprietary blend, are unlikely to reproduce the effects seen in the research — even though the ingredient name on the label is technically accurate.
This is one of the reasons Tongkat Ali features prominently in AlphaSteel's formula, alongside Boron — see our breakdown of the Boron research for the other half of the testosterone-energy picture.