In terms of the specific Maca Root content, our powder contains 'Yellow', 'Red', 'Purple' and 'Black' roots, with the primary source being of the yellow variety (approximately 70%, with the remainder being made of other 3 in varying proportions). You may find that some different Maca retailers do not differentiate between 'Purple' and 'Black' Maca root. However, the two roots have slightly different nutritional composition, thus our supplier finds it necessary to distinguish between them.