I didn't either, my fiancee actually told me about it and I was hesitant until I did the research for myself, my psychiatrist just recently read that article too, it's definitely seen as something only people with a serious mental illness should take but from my experience it's definitely not true. Both parts aren't true there are are a lot of people with bipolar disorder that you would never guess had it, my psychiatrist isn't sure if I have bipolar 2 or if some of it is just symptoms of ADHD (I'm a mess lol) but either way lithium has helped me and other people I know who haven't been diagnosed with any mental illnesses.