I wonder if there is a scientific reason for the change in taste and smell. I know I had it. I quit telling people what I was smelling because they thought I was crazy. My nose was so sensitive to smells. Before surgery, I liked protein shakes for breakfast. I liked most of them and after surgery, I could not stand any of them. I am glad to see I am not the only one. I had surgery July 10th, the smells are back to normal, but I still don't like the protein drinks.