tribulus terrestris with maca - GET HARD PILLS - maca and tribulus, 3 Bottles (180 Capsules) Muira puama is a plant that grows in Amazon rainforest. It uses to make daily supplements for boost energy and several other uses. Another ingredient is Astragalus. It a herb that has been used in traditional world practice. Astragalus is the plant native to Asia. It can often be used to boost energy and improve immune function.