At the age of 60, testosterone levels are typically only 40-50% of youthful levels and may be lower
Eurycoma contains a group of small peptides referred to as “eurypeptides” that are known to have effects in improving energy status and sex drive in studies of rodents
The effects of tongkat ali in restoring normal testosterone levels appears to be less due to actually “stimulating” testosterone synthesis, but rather by increasing the release rate of “free” testosterone from its binding hormone, sex-hormone-binding-globulin (SHBG)
The current study found that daily supplementation with tongkat ali root extract (200 mg/day) improves stress hormone profile (lower cortisol; higher testosterone) and certain mood state parameters (lower tension, anger, and confusion)
tongkat ali supplementation (100 mg/day) improved lean body mass, 1-RM strength, and arm circumference to a significantly greater degree compared to a placebo group.
In a recent 12-week trial [46] of Eurycoma longifolia supplementation (300 mg/day), men (30–55 years of age) showed significant improved compared to placebo in the Physical Functioning domain of the SF-36 quality of life survey
sexual libido was increased by 11%
In men with low testosterone levels (average age 51 years), one month of daily supplementation with tongkat ali extract (200 mg/day) resulted in a significant improvement in serum testosterone levels and quality-of-life parameters
rise in cortisol and drop in testosterone is an early signal of “overtraining”
Tongkat Ali, commonly known as long jack, is found to reduce stress and increase Testosterone. Stress is one of the common causes of low T in men. It appears that long Jack functions as an adaptogen.