Soy Milk and copper

I read on a blog that overuse of soy milk contributes to erosion of the esophagus, stomach and upper intestines. That made me nervous because I love to drink soy milk and I've given it to my children. I contacted another mom of an autistic child in huntsville and she told me that soy raises copper levels. Raised copper levels can lead to aggressive behavior. She suggested that I give him zinc to stabilize his copper levels. He takes a gluten-free multivitamin everyday anyway. The soy milk was stopped. He doesn't really care for rice milk. I also learned that Rice Dream milk DOES contain gluten. I plan to try almond milk next. Parents have told me that kids tend to prefer almond milk due to the rich sweet taste. I found a recipe for gf/cf chocolate chip cookies on gfcfexperience.com. I just don't know where to find gf/cf chocolate chips. I am also looking to see if there is a local natural food co-op that I can join. It tends to take me a few days to get something done. I try to do at least 3 things a day pertaining to my son. I need a day off! LOL