Well, he places his own product as no. 1 in the list, which should tell you something.
This is the guy who sells magnesium oxide, the cheapest form of supplemental mag, at a pretty high price as a colon cleanser. Oh wait, it's got geraniums in it. Or germanium. It works, don't get me wrong, it's just a little overpriced in my opinion.
Your client is obviously responding favorably to iodine. I'm sure it's fine but considering the source, maybe not the best value.
When it comes to Iodine advice, I'll take Trapper's and Edgar Cayce 's any day over the adorably winsome Dr. Group. :-)