I have been working really hard to get my A1C number down since diagnosed. 10.1 at diagnosis – last week 5.8 . I’ve been really watching what I eat, writing items down and exercising. I now want to start adding supplements that may help. One of those suggested is berberine. What is the best source to purchase it and how much do I take? i’ve read a little about it, but can’t always believe what I read on facebook.