Eurycoma longifolia Jack is the scientific name for what is more commonly known as Tongkat Ali, Malaysian Ginseng, or Longjack. Although every part of the Tongkat Ali plant is used by traditional herbalists of Southeast Asia, its root is especially prized. Tongkat Ali is known to possess various naturally occurring bioactive compounds, including Eurypeptides and Saponins. NOW® TestoJack 300™ delivers 300 mg non-GMO Tongkat Ali extract per capsule. Suggested use Take 1 capsule daily as needed, or as recommended by your healthcare practitioner. Other ingredients Cellulose powder, cellulose (capsule), silica and magnesium stearate (vegetable source). Not manufactured with yeast, wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.