I am 6 weeks post op and just read the symptoms of Ketosis which can include being spacey! I was really worried but I am assured this, too, shall pass! Most of us will experience the Ketosis because of the carb restriction....I have experienced most of the symptoms including headaches....but am finding my perspiration has an odor I have never had before....I live in AZ and summer is starting but I think this is a side effect of the surgery....anyone else had this happen?