I've encountered the same issue with dry skin. My eye lid, yes...eye lid, has an itchy, fish scale looking dry patch and the only thing that I have changed in my routine, is that I added Alli. Oh, and never in my life have I had dandruff, but I have also started to notice this issue.
I have read other blogs and it does seem like this is more common than the dietitian is aware.
Oh....I just noticed that your post is over a year old - perhaps we can get more info on this now?