Tongkat Ali, also known as Eurycoma Longifolia Jack, Malaysian Ginseng, or Longjack, is a herbal supplement traditionally used in Southeast Asian medicine. There are a few different types of Tongkat commonly known as yellow, red, or black. Ours is the yellow Tongkat which is typically regarded as the most potent. Our product is also an extract of the eurycomanones, which is the chemical compound responsible for Tongkat's effects.