Maca powder, a natural source of amino acid argentine, is sold both as a sexual-enhancement health supplement for male impotence and low female libido, and as a general nourishing tonic that can boost energy.
The powdered root can be sprinkled on foods, or mixed with water and other beverages, but the taste isn't anything special. Add a few teaspoons to a soy, or almond milk smoothie as part of a healthy diet.