If you eatwell , you will be well ; however, if you eat badly , you will feel bad .
Wiktionary
Origin of You Are What You Eat
of German YOU ARE WHAT YOU EAT YOU ARE WHAT YOU EAT derMenschist , waser ißt , coined in 1850 by Ludwig Feuerbach in a review of Jacob Moleschott 's Lehre der Nahrungsmittel. Für das Volk (Erlangen, 1850). Compare German man ist, was man isst .