Hi Katie,,
My 5 year old son also has tourettes. I too bought the book and am trying to change my son's diet. I took him off gluten. I'm trying to cut out refined sugar but, it's difficult. I changed the hand soap we were using as it had colour in it. I vacuum often to eliminate dust in the house. Some days are worse than others. I found the months of April and May to be bad. Was it something in the air blooming? I don't know. I want to get my son tested for allergies but, I live in Canada and I can't find an environmental physician that does it. I posted asking if anyone has used an environmental physician in New York state but, I didn't get a response. I did find a therapist in my area that has personal experience with Tourettes. Once I am ready to tell my son he has TS. I will be using her to help explain it to him.
These are some of the things I'm doing. Good luck to you.
Cathy