Catuaba refers to several tree species native to Brazil, long used in traditional wellness tonics associated with male vitality and desire.

Its traditional use overlaps with Muira Puama's, and the two are frequently combined in Brazilian herbal tradition for that reason.

In this formula, it's positioned as a complementary ingredient rather than the lead — rounding out the circulation-and-vitality side of the blend.

Where it sits in the formula: one of four named ingredients on the MaxForce label, alongside Muira Puama Extract, Maca Extract, Ashwagandha.