Researches have shown that amongst the benefits of the TA extract are: increase of testosterone, balance of blood pressure, improvement of the immunologic system, enhance metabolism as well as said uses in treating malaria, allergies, ulcers, fever and cancer. For this reason the tree is known for centuries by the natives in that region where the tree is found as "The Tree Cures a Hundred Diseases. The effect which has most of all attention is with now doubt the increasing hormone testosterone and its positive consequences: - Increase of muscular mass; - Reduction of body fat; - Enhance Metabolism; - Improvement of mental focus and clarity; - Increase in sexual performance. The levels of testosterone start to gradually diminish, at a rate of 1% - 2%/ year - around the 25 years of age. Between the age of 50 and 60 years old the level of testosterone is down to 50% of what once had at 25 years old. Is the increase in testosterone the cause for prostate cancer? If that would be true, young man of 20 years old would be the number one in this type of cancer. The problem is found in the conversion of testosterone in DHT (diidrotestosterone) by the action of the enzyme 5-alfa-redutase. The TA extract avoids the action of such enzyme. One thing is for sure - high levels of testosterone in the blood stream mean more disposition, happiness, youth and energy. It is not needed to prove anything else about the Tongkat Ali effects; simply search thousand of websites on the internet. Some exaggerations may be made, but the truth of the matter is that it works. We may even suggest that before trying the TA extract you make a couple of blood exams in order to verify your levels of total and free testosterones and after two or three month, repeat the exams and compare - specially the free testosterone level. However, you may also find testimonies from people who did not feel any changes. The answer is simple: they were either deceived, and this may easily happen, or they are young people at the age between 18 and 25 years old; no extra fat, lots of muscles, sexually hyperactive; their levels of testosterone high up. Even these young men could experience some improvement, however their perception of those effects are not as evident on those with high levels of testosterone, and as they are naturally impatient, they soon abandon the process after using for just a couple of weeks. Now if you have low libido levels, you are disappointed with live, lazy to make exercises, no energy or resistance, having a hard time to concentrate, osteoporosis, memory loss, erection problems, difficulty to increase your muscle mass, too much body fat, thus, with a falling level of testosterone; surely the response will be favorable.