Muira Puama comes from a shrub native to the Brazilian Amazon, where it's long carried the nickname "potency wood" in traditional use for male vitality and stamina.
It's studied mainly for its association with healthy circulation and energy, which is the mechanism most often cited for its traditional reputation.
It's the first ingredient listed on MaxForce's label and the one most closely tied to the brand's stamina and performance claims.
Where it sits in the formula: one of four named ingredients on the MaxForce label, alongside Maca Extract, Catuaba Extract, Ashwagandha.