i.e. vs. e.g.

Both are Latin and we use both parenthetically, but that’s where the similarities end:

i.e.

id est  >  that is (to say)  >. in other words

e.g.

exempli gratia  >  for example

In a sentence

If you don’t get your dietary proteins (e.g., meat, cheese, eggs) 

your muscles can’t develop (i.e., get bigger).

Note that both e.g. and i.e. take a comma.