Dis-moi ce que tu manges, je te dirai ce que tu es.
Tell me what you eat, and I shall tell you what you are.
Der Mensch ist, was er ißt.
Man is what he eats.
Ludwig Andreas Feuerbach, Die Naturwißensschaft und die Revolution [Natural science and the revolution] (1850), repeated in Das Geheimnis des Opfers, ober der Mensch ist was er ißt [The mystery of sacrifice, or man is what he eats] (1862)[1]
Man is what he eats.
Victor Lindlahr, You Are What You Eat: how to win and keep health with diet (1942).