I began the Paleo way of eating because I have Type 2 diabetes and couldn't control the highs and lows. Every time I ate any kind of grain even in small amounts my blood glucose shot up to dangerous highs and the meds made it bottom out to scary lows. I had gained a lot of weight in a short period of time as my body tried to tell me that it no longer could handle grains.
This has been a long journey for me but Paleo keeps my blood glucose in the normal range 100% of the time since I began eating this way 3 months ago. I have lost weight and am on my way to being a healthy person. Now I realize that my body was reacting to grains for many years while I fought to keep my weight down. I watched other people eat more than I did and never gain and was so frustrated. Horay for Paleo!!!