To be a dirt eater "NORMALLY" refers to eating deep earth clay.
Babies, children and as well adults do eat allot of dirt and tbe air we breathe in a house is full of dirt/hair/dust.
Some people have lived on dirt for long periods of time.
I have no problem eating deep earth clay but would not suggest eating surface clay. It should be a teaspoon or less in 1 gallon of distilled water and set in the sun for a day for best results.
Clay is too large to enter the blood stream and does not do damage like vitamins do.