50mg IS a mega dose and I was asking you whether or not you have any evidence of the long term safety and effects of such dosages. It sounds as though you don't.
My advice is to newbees - consult your doctor (an actual personal doctor face-to-face who's in a position to be diagnosing you and checking your medical background, not an online doctor you have never met who is in no position to be diagnosing you of anything) before considering high dosages way over the generally accepted tolerable and safe amount. Until then don't put your health into the hands of online doctors selling iodine supplements because this stuff can have serious and chronic side effects and shouldn't be haphazardly experimented with. If you aren't getting any dietary iodine take some kelp tablets like I do or other small dosages because high dosages can not only be extremely risky short term, but the long term effects seem to be unknown.
I could easily see some easily influenced people who are new to this lifestyle who might start these iodine supplement protocols simply because they think that's what everyone on this forum is doing. Without knowing their medical background it could have disastrous health consequences for some.