Spain's Alberto Contador eats a banana in as he rides in the pack during the sixth stage of the Tour de France on July 10, 2014. The cyclists aim to eat up to 350 calories an hour as they ride, and up to 9,000 calories a day.
Soylent CEO Rob Rhinehart holds a bag of finished product in September 2013. Rhinehart recently discouraged members of the company's DIY online community from competing directly with Soylent.
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A nutrient-dense diet may help tamp down stress. And these foods may help boost our moods (clockwise from left): pumpkin seeds, sardines, eggs, salmon, flax seeds, Swiss chard and dark chocolate.