Tongkat Ali comes from a root native to Southeast Asia and is also marketed under the name longjack. Of the three botanicals in this formula, it has the most repeated human trial data.
Studies in stressed adults have reported a lower cortisol-to-testosterone ratio after supplementation — the mechanism most often cited for its effects on mood and drive.
Extract quality and standardized eurycomanone content both affect how well a given product performs, and neither figure is published for Primordial Vigor X specifically.
In Primordial Vigor X: Tongkat Ali (Eurycoma longifolia) is one of three named botanicals in the 870 mg serving — see the full breakdown on our how it works page.