I think you misread it. They were discussing the symptoms of celiac disease. Some people wrote their symptoms went away when they went gluten-free. Do a search on celiac disease and peeling lips or gluten-free diet and peeling lips. You will find evidence that celiac disease or gluten sensitivity causes peeling lips. That is why this post sounds suspicious. But I do believe a person's lips can peel if they do not get enough vitamins/minerals due to strict diet. Again, one needs to make sure the right foods are selected to avoid this deficiency.