Independent Studies

British Journal of Sports Medicine

Studying: The Ergogenic Effects of Eurycomanone.

Published: 2003

In 2003 Tongkat Ali was clinically tested against a placebo and came back with impressive results, the effects of Tongkat Ali extract (referred to as 'Eurycoma Longifolia' in this study) are documented in the British Journal of Sports Medicine (Article Number 007)  The tests show a significant increase in testosterone levels over a twelve week period of usage compared to those using the placebo.

Results:This resulted in the candidates that took the Tongkat Ali having a greater increase in fat-free mass at the end of the trial.


Journal of the International Society of Sports Nutrition

Studying: The effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects.

Published: 2013

This study was conducted using a low dosage of standardized Tongkat Ali extract for treating lethargy, low libido, depression, and fatigue and appears to restore hormone balance (cortisol/testosterone), improving psychological mood state in humans.

Results:The study found that daily supplementation with a low dosage of standardized Tongkat Ali root extract raised salivary testosterone levels by an average of 37% vs. the placebo. Click here for more information.


365 Fitness Magazine

Studying: The effects of taking two TKA 1:200 capsules per day on 30 male participants over a short two week period.

Published: 2017

According to 365 Fitness Magazine, they started off with the intention of testing a wide range of natural herbal testosterone boosters and found Tongkat Ali extract was the only product having any effect.

After the first two weeks, they decided to forgo the product shootout and test the remaining TKA1:200 stock on all 30 participants at just two capsules per day and record the results.

Results: TKA 1200 had a group average testosterone increase of 56%, with the highest responder having a 210% increase. Click here to read the review.

Extract Types