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When cortisol rises due to stress, sleep deprivation, or excessive training, testosterone production can drop. While not every study shows dramatic effects, several well-designed studies have produced encouraging results. In other words, supplements often work best when they’re supporting the overall system rather than acting alone.
The researchers found that Eurycoma longifolia may have some effect on endurance activities with high doses and long-term intake . According to the study, the extract significantly reduced people's anger, stress, and uncertainty. One research on Sports Nutrition looked at stress hormones in 63 participants who took Tongkat Ali extract or just a placebo for four weeks. It was discovered that males who combined concurrent training with Eurycoma longifolia improved their sexual well-being .
Third, compounds in Tongkat Ai inhibit sex-hormone binding globulin (SHBG), which in turn leads to more freely circulating testosterone in the body. Second, Tongkat Ali also inhibits the aromatase enzyme, an action that slows down the amount of testosterone converted into estrogen. First, this herb increases testosterone production in the testicular leydig cells.
But like many natural supplements, it isn’t magic, and understanding how it works is key to using it properly. Does Tongkat Ali actually increase testosterone — or is it just another overhyped supplement trend? Often referred to as Longjack, Tongkat Ali is a traditional herbal extract that has been used for centuries in Southeast Asia.
Supplementing with vitamin D can help support hormonal balance and overall health. Many people living in northern climates have low vitamin D levels due to limited sun exposure, particularly during winter months. Because testosterone production depends on multiple biological systems, combining supportive nutrients can sometimes produce better results than relying on a single ingredient. Zinc, magnesium, vitamin D, and certain herbal extracts all play roles in hormone regulation. Yes — Tongkat Ali is often combined with other nutrients that support testosterone production. Strength training stimulates testosterone responses that support muscle growth and recovery.
"For most guys, it’s only going to raise your levels 30 points or so, which isn’t enough to meaningfully change your symptoms," Dr. Jayadevan explains. However, the amount Tongkat Ali raises T levels is not to any significant effect. In addition, the studies included reported no or minimal side effects from using the Asian herb. Welcome to Testosterone HQ—Men's Health's guide to the exciting, complicated, and revolutionary world of testosterone.