Tongkat Ali (Eurycoma longifolia)
Tongkat Ali is a flowering plant native to Indonesia, Malaysia, Thailand, Vietnam, and Laos. Many of the common names refer to the plant’s medicinal use and extreme bitterness. An electronic taste sensor was devised to detect the presence and concentration of quassinoids and determine the use of genuine E longifolia. Quassinoids, the biologically active components of E. longifolia root, are extremely bitter. They are named after quassin, the long-isolated bitter principle of the quassia tree. Quassin is regarded as the most bitter substance in nature, 50 times more bitter than quinine. The plant parts have traditionally been used as herbal medicine because of its antimalarial, aphrodisiac, antidiabetic, antimicrobial, and antipyretic properties. Apart from its use as a traditional medicine E. longifolia is used as food and drink additive. According to WebMD, evidence suggests that E. longifolia supplements might have a role in boosting sperm quality.