Eurycoma longifolia (Tongkat Ali) root extract comes from a traditional Southeast Asian plant. People take it to boost vitality, physical stamina, energy, and recovery after exercise.
Most extracts are standardized to eurycomanone. Human studies on the extract are limited, so evidence remains thin.
Dosage depends on the product and concentration. Use caution if you take diabetes or blood pressure medications. Avoid during pregnancy and breastfeeding. Talk to a doctor before starting.