I'm not the expert you're looking for but from nearly 3 years of trying all forms I'm firmly in the SSKI camp when it comes to tolerable results as even to someone who is supposedly 'iodine saturated' too much elemental like Lugols will cause oxidative stress. You still need Lugols but maybe just a few drops. High doses of elemental are too much of a good thing where SSKI is easily tolerated by most even in multi-gram amounts. You won't find better or cheaper SSKI than trappers and he discounts the larger amounts even further.