Is it true you are only as smart as the food you eat

Question

Like if you eat Chickens and Cows you will eventually become as dumb as them

Answer 1

I'm sure its all in our heads but it seems like we actually 'are what we eat' we actually do share a lot of habits with the food we eat though, whether we realize it or not.

Answer 2

The quote is  "You are what you eat." Meaning if you eat high fat foods, you will be overweight.