Tongkat Ali Benefits
1. Aphrodisiac effects of Tongkat Ali
Anecdotally, Tongkat Ali (also named Eurycoma Longifolia Jack) has been used as an aphrodisiac. Studies show positive effects and relatively high potency compared to other herbs. Two studies show an increased libido in men in the range between 8,4 and 8,7%.   Since this herb contains 9-hydroxycanthin-6-one molecule, there is a high chance men will experience delayed ejaculation.
Tongkat Ali Benefits
2. Tongkat Ali may increase testosterone
There is some evidence   proving the effects of the testosterone boosting power of Tongkat Ali. More studies have to be done to confirm that, but current data and studies on rats seem to be promising. 
3. Stress reliever
One study shows positive effects in improving stress hormone ratio. In the same study, the subjective rating of stress was improved after taking Tongkat Ali supplements for about 2-4 weeks. 
4. Tongkat Ali improves fertility
A 9-month study of 75 males shows that supplementing with Tongkat Ali improved semen volume, sperm motility, quality, and sperm concentration.  Another study focused on men 30 – 55 shows similar results. 
Tongkat Ali Fertility
5. Tongkat Ali may improve sexual health
Two studies   shows that supplementing with Tongkat Ali increased libido, improved erectile function and improved overall sexual performance in men.
Similar results are shown in study rats .
6. Tongkat Ali and weight loss
There is some evidence showing that Tongkat Ali may promote weight loss in men.   Similar results are shown in mice.
7. Tongkat Ali may also enhance muscle strength
A 5-week pilot study shows that Tongkat Ali supplements increased muscle strength in women and men.  Combine this benefit with the weight loss benefit and you have a powerful supplement.
8. Tongkat Ali and immune system
One study shows the positive benefits of supplementing Tongkat Ali on our immune system. 
9. Tongkat Ali may combat cancer
First studies (done on mice and in a laboratory) show that Tongkat Ali might be beneficial against several types of cancer.   More studies have to be done, but again, it looks promising.
Eurycoma longifolia is also used for treating malaria, fever, malar, cancer and several other diseases.
There is a lack of research proving the benefits of Tongkat Ali, but due to the fact that taking it as a supplement might decrease your stress, it sounds like a good supplement to be taken, especially if you have any of the previously mentioned diseases.
Besides, the root of Eurycoma longifolia contains lots of chemicals that seem to affect the process of producing hormone testosterone in our body. 
Now we understand the main benefits of Tongkat Ali.
But let’s learn more about it.