Tongkat ali is an herb which grows in the jungles of certain South East Asian countries including Malaysia, Indonesia and Thailand.
There are some research done to prove what Tongkat Ali helps in.
1...A Malaysian study published in 2012 took 76 men of whom only 35% had testosterone levels in the normal range. Following a month of treatment with Tongkat ali, this number rose dramatically to above 90%.
2...A study published in 2010 observed the changes in sperm quality in 75 men who were given 200mgs of tongkat ali each day for three months. Sperm quality improved significantly in these patients and 15% of participants reported spontaneous pregnancies following the treatment.
3...A study published in 2003 fed older rats and retired breeders with tongkat ali for a 10 day period. The rats given the extract demonstrated a significant increase in sexual activity and mounting frequency on female rats.