Vitamins / Supplements :: Hashimoto's And Selenium

I've been struggling with my Hashimoto's diagnosis. I am actually "alright" at this present moment, but it was a long and rocky road. My Endo is not very informative at all and does not answer my questions. Last time I asked her about taking supplements. She stated she is biased because she practices Western medicine and won't comment on whether or not she thinks it's a good idea to take supplements.

I decided a little over a year ago, to take 200 mg Selenium as an added supplement, because I've been reading on here, that it will help with getting the antibodies down and I must say, I can tell a difference in how I feel today from before.

Now here is where I'm confused: my best friend since Kindergarten got diagnosed with Hashi's last year. She's really been having a hard time with it. Last time she saw her Endo, she asked the Selenium question. Her Endo said don't take it, because your risk of developing diabetes increases! That's something I've never heard about. So all day today I've been reading and researching this and I'm reading either it's so good to take when you have Hashi's and then some study they did that confirms my friends' Drs' point about the increased diabetes risk. Any thoughts?