I don’t see why these formulations have both iodine and iodide.
Lugol’s was probably developed as a multipurpose formula that could
be used either as a disinfectant or iodine supliment.
The iodine in seaweed that the Japanese eat must be in the iodide form. (sodium iodide).
Iodine (the element) is useful as a topical disinfectant but if applied to the skin
or taken orally probably kills some of our cells as well since it is a fairly strong oxidizer.
It seems that the risk of toxic effects as well as problems with killing helpful bacteria in the
intestine would be reduced by simply taking the iodide form.