Maca is awesome man. Buy a gelatinized maca powder and add it to your oatmeal, smoothies etc.
The nutrients in maca assist the body in balancing hormones, and all the benefits derived from better hormonal balance (e.g. more energy, less stress, better moods, enhanced libido, etc.).
In particular, maca has been shown to reduce belly fat by reducing cortisol, increase stamina, improve libido and eliminate hormonal imbalances.