Bill Simpson said, in part, "As for the finish, I use Mineral Oil, I also like to add Paraffin to the oil to give a luster and hardness to the piece. BUT recently I have been reading where studies show that raw wood is a natural disinfectant and Bacteria left on raw wood dies at a faster rate than sealed wood. so us od a finish is for cosmetic purposes only as the safe way is to leave it raw. "
Absolutely true. But, many folks just can't seem to accept that and are afraid of wood for food use. Those studies (available with 'net searches) show that wood surfaces do kill bacteria while synthetic surfaces allow those disease bearing buggies to live quite a long time.
I use olive oil although some (especially Californians ) decry that practice.
Oak is the traditional wood but most hardwoods are fine. End grain up is traditional on professional chopping blocks. But as long as gluing is not on end grain, you should be just fine.
"Folks is funny critters."
Think for yourselves and let others enjoy the privilege to do so, too. ~Voltaire