I keep finding varying info on the old posts, but I think I might be taking the wrong form of selenium. I am currently taking 200mcg of selenium selenate but I read that selenomethionine is better. Can someone please explain to me why? And is the yeast form better or the yeast-free? I have been taking 100mg of Lugol's now for 7 weeks and just in the last week I have been getting breathlessness and my throat feels a bit odd when swallowing. I read this could be a lack of selenium. Any advice please.