Thanks! Our nutritionest was out on vacation so we couldn't get a hold of her. She explained everything (like you did also). They did tell us when it was low that if it didn't come up on the next blood test we would have to add infant formula back in his diet because he can't tolerate milk (it gives him bad stomach aches). But they started him on eggs and his level went up to 2.4 so they aren't worried! Thanks again for the answers!