Maca powder is a nutritional supplement made from the root of the maca plant, which is native to Peru. It has been used for centuries by indigenous people in that region as a natural energy booster and an aid to fertility. The powder contains high levels of vitamins B, C, and E, as well as calcium, iron, magnesium, and zinc. It is often marketed as a way to improve overall health, increase libido, and enhance athletic performance.