Time tosses aside the trivial. That's why you should pay particular attention to sayings that take on a life of their own, especially ones that outlive three different speakers in three different countries and pertain to your health.
"You are what you eat" is one such statement. First expressed by the French food critic Anthelme Brillat-Savarin in 1826, the sentiment was then written in a philosophical essay by the German philosopher Ludwig Andreas Feuerbach 37 years later.