Tongkat Ali is a proven testosterone booster. This herb is particularly renowned for its ability to increase testosterone levels significantly. Testosterone hormone is primarily responsible for the growth and development of male reproductive organs. Normal testosterone levels maintain energy level, mood, fertility, and desire. It achieves this by positively affecting hormonal balance which naturally stimulates the body to produce more of the free testosterone. This testosterone supplementation in turn increases muscle strength and muscle mass, which are important for physical function and athletic performance.