Mad Rock Pro Peter Dixon came out of nowhere to win the Portland Boulder Rally in 2013 against a strong field of experienced bouldering veterans. His secret: a great diet. He's vegan, and knows everything about nutrition and the body's processes - from the best part of a vegetable to the way you blend ice in your green smoothie.
Here's an edited, shorter version of his smoothie video.
See the full version (with more information) here: youtube.com/watch?v=L6_mjyK6KC8