This book is excellent for those with Diabetes Type I or Type II. I was diagnosed with Type II Diabetes a year ago. I saw Dr Gary Evans on Doug Kaufmann's program and purchased his book. It is the best book for informing you on a supplement that makes it possible for you not to have to take conventional medication and/or make it possible for you to reduce the dosage. This product has been known about since the 1950's. I highly recommend the book and Chrominum Picolinate.