"I don't understand why Cutler suggest not taking Alpha Lipoic Acid when there is too much copper in the system."
He does not actually say that. What he says is not that simplistic. For example.
Remember his primary work is helping people to recover from autism and chronic mercury exposure--amalgams, large predatory fish, vaccines, accidents with cfl bulbs or old thermometers, etc.
Cu and Hg are nasty when present together. He says Cu produces many of the symptoms of Hg. It seems that about 5% of the members of the Cutler groups have very high copper.
Roughly 10 yrs ago when his chelation protocol was first introduced there was evidence that lipoic acid would cause the body to retain copper and maybe zinc as well. A copy of his protocol paper to a 2001 DAN! meeting is in the Files section of the yahoo Adult Metal Chelation group and maybe also the Autism-Mercury group.
He is also dealing with a lot of brain fogged people and the often frazzled parents of autistic kids. He chose to be extra cautious when he designed his protocol. That is one reason I chose his protocol.
Since high Cu is not healthy in itself and since there was reason to think that LA might cause the body to retain it, it was right for him to take a cautious approach.
Also it is generally not too difficult to get the Cu levels down into the high norm levels. It seems to take about 2-3 months with supplements and diet. He has recommendations in his book, Hair Test Interpretation.
In more recent years he has tweaked the protocol to allow longer rounds because copper has not been shown to be a problem while chelating with his protocol.
This is probably Cutler's current view on copper and LA.