I had been using a Redkin shampoo and conditioner. Every single time i used it, my head itched and itched and itched. I had to stop using it. When I said something to a person at a wholesaler (my husband is a hair stylist) She said "oh, are you gluten intolerant or Celiac? It has a HUGE amount of wheat filler in it!" I was like hmmmm...that's interesting...