I believe the inability to make saliva would affect digestion drastically. The first phase in the process of digestion comes with saliva - it breaks down some substances in your mouth, because it contains amylase which helps during this process. If it weren't for saliva, you probably wouldn't even be able to swallow food - and even if you did, it would be almost impossible to break it down in your body.
The nucleus controls everything in a cell
I'm guessing the answer would be protein because I know meat falls in the protein category in which ice cream would have a lesser quantity
Hope this helped!
The Nervous System and The Endocrine System.