Yes it is, but I'm not worried. GSE works and it works really well. I've used GSE for many years with patients and figure that using it to eradicate candida for a period of time is better than not using it at all for fear of the "consequences" of yet placing some other stuff in teh body that may cause an issue.
Heck, you can worry yourself sick on just about everything these days, take your pick. Do you use a smart phone? Probably more "toxic" than Benz. chlor. And what about pollution in the air and water? It's kind of funny how we can become fixated about one or two things in life, and then tend to overlook the total body burden we face today.