Tongkat Ali (Longjack)
*Take 50mg-100mg per day*
Tongkat ali may have health benefits for certain conditions. The following sections will look at some of these conditions in more detail.
Male fertility and sexual performance
Some research indicates that E. longifolia may enhance male fertility and sexual performance.
According to a 2016 review, animal and human studies suggest that the beneficial effects may include:
- increased semen volumes, sperm count, sperm viability, and sperm motility
- increased production of testosterone
- enhanced erectile function and sexual performance
A 2019 study in rats suggested that the aphrodisiac effects of E. longifolia may be due to the elevation of testosterone levels and enhancement of dopamine in the brain.
Athletes sometimes use ergogenic aids to enhance their performance. E. longifolia may act as an ergogenic aid because it decreases stress and increases testosterone levels, according to one 2016 review.
The researchers concluded that with high dosages and long-term supplementation, E. longifolia might have some benefit in relation to endurance performance.
A 2014 pilot study in physically active people aged 57–72 years reported enhanced muscle strength and increases in testosterone following supplementation with E. longifolia extract for 5 weeks.
A 2018 review examined the evidence for E. longifolia on osteoporosis in rats. It concluded that E. longifolia seemed less effective than other traditional Malaysian herbs.
However, there could still be potential for its use in preventing bone loss, according to the review.
A study in the Journal of the International Society of Sports Nutrition assessed stress hormones in 63 people taking tongkat ali extract or a placebo for 4 weeks.
The researchers saw significant improvements in anger, tension, and confusion in people taking the extract. Testosterone levels increased, and levels of the stress hormone cortisol decreased.
They concluded that tongkat ali might be an effective remedy for modern-day chronic stress, sleep deprivation, and exercise training.
Another study from 2018 looked at the combined effects of E. longifolia and multivitamins in moderately stressed but otherwise healthy participants. The participants reported enhanced vigor and emotional well-being. Glucose concentrations also decreased, which may also have contributed to the participants’ well-being.
Scientists are discovering and identifying new quassinoids in E. longifolia that may help fight cancer. Laboratory studies in test tubes indicate that the compounds are toxic to lung and cervical cancer cells.
A review from 2018 identified 16 compounds in E. longifolia, isolated from various parts of the plant, that showed promising anticancer properties.
Another laboratory study indicated that quassinoids from E. longifolia were effective against human prostate cancer cells. However, the Endocrine Society contraindicate testosterone treatment in prostate cancer, so using the plant for this condition is not advisable.
Anti-inflammatory and antimicrobial effects
Some research indicates that E. longifolia is effective against bacteria, including Escherichia coli and Salmonella typhi.
In test tube studies, extracts of the plant showed anti-inflammatory and antioxidant properties.