I forgot the brand name of the tablets she took. If you do a Google search of kelp arsenic, you will find several articles, and at least one mentions the brand name. The article said that they tested several brands of kelp tablets they bought off store shelves, and all except one had arsenic levels that were too high.

she took kelp tablets, each provising 225 mcg of iodine.

"What would you do JK? "

I think it is probably best to avoid kelp if you have another source of iodine supplements you can take. Those who don't, would probably be okay taking one kelp tablet a day for a month or two.