More ideas…Visit your nearest health food store, such as GNC. They have a variety of protein supplements. Also consider plant based protein such as beans. Many vegans use these as their only source of protein. I have used these in soups and chili which combines beans with meat. Google vegan sources of protein and you will find many sources and recipes to try. How about soy or almond milk if you cannot tolerate dairy.Have you consulted a dietitian? Mine at Rochester Mayo gave me samples of supplements to try before I committed to buying. Hang in there…I still do not have saliva but have adjusted my eating habits and found a new normal.