The Moringa stenopetala is native to Ethiopia and Kenya. It is a different species than its Indian relative, Moringa oleifera. Although ORAC tests have not been conducted for the latter, given that it is a close relative, one can presume the antioxidant content for both is similar. The sample measured used both dry leaves and stems.
Research Support, Non-U.S. Gov't: Carlsen MH, Halvorsen BL, Holte K, et al. Nutrition Journal NIH Jan 2010