Haha, reminds me why I haven't been back to one of my lfs after they tried to sell me their "store brand" iodine supplements. I said I don't test iodine and I don't dose anything, I don't test for. He says it fine you can't overdose if you follow the directions, I say sure you can. He wasnt pleased that I wasn't buying what he was selling, and tried to persist debating with me about it. I finely said, I'll just go shop somewhere else, and left. I should mention I went in looking for a bucket of Red Sea salt mix, no supplements what so ever.
I haven't been back. A stupid thing really, but they are a pushy, used car salesman type shop. I'm lucky enough to live in an area where I have choices though..