Tongkat Ali is one of the most researched natural test boosting ingredients on the market. One study in 76 older men showed

200 mg of tongkat ali extract per day significantly increased levels of this hormone to normal values in over 90% of participants. (linked below)

The same study found that Tongkat Ali also improved erectile dysfunction as well!

Another study found that Tongkat Ali, "is (a) natural alternative to TRT and has been shown to restore serum testosterone levels, thus significantly improving sexual health."