[1] http://www.nature.com/mp/journal/v7/n4/full/4000976a.html
Steve Jobs was know for eating fruit high in phenyalanine (well tyrosine)[1]. It may have contributed to his high performance.
[0] https://en.wikipedia.org/wiki/Phenylketonuria#Genetics [1] https://en.wikipedia.org/wiki/Tyrosine
[1] http://www.nature.com/mp/journal/v7/n4/full/4000976a.html