I have a 3 year old son born with autism. We have him on a GFCF diet. We were told Banana Boat was a good sun screen for him because of the diet he is on. It's suppose to be free of gluten or casien. We notice a bit of a change in him over the course of the next few days. He doesn't make as good eye contact. Seems to get a little zone. Just doesn't respond well to direction. It lasts a few days and then he seems to bounce back to his regular self. Does anyone know a sunscreen we could use on our son who's on this diet? Any ideas or recomondations would be appreciated. Thank-you.