Tongkat Ali, Male Libido Tonic, Value Size, 120 Tablets, Source NaturalsSource Naturals Tongkat Ali Dietary Supplement. Male Libido Tonic. Tongkat Ali, also known as long jack, has been shown to support male hormonal balance (including testosterone levels), libido and performance, according to preliminary research. It has been traditionally used to enhance energy levels, endurance and stamina, and to reduce occasional mental fatigue. What health benefits does it provide? Preliminary studies show that tongkat ali, also