Hi, There is a good book on Chromium Picolinate, "Everything You Need To Know", by Dr. Gary Evans. I purchased this book and started following the program for the weight loss about 2 years ago when I was trying to lose weight. I have been on the chromium now for 2 years religously. It does help with the blood sugars and I know this for a fact, because two years ago, even though I was taking it, we had alot of company that summer, and I missed a few doses, or I would take one pill and not the next. I had my blood profile done then in September (after all relation had left), and my blood glucose was high - even after fasting. So, this year I made sure I had taken my chromium each day (400-600 mcg), and my blood glucose was back down where it should be. But it also shows me I need to stay on the chromium for the rest of my life.
The main thing is to talk to your Dr. before starting any supplements, especially if you are on prescription meds.