I think so. Diabetes is on some ways an operational definition. I have been diagnosed with diabetes and hypoglycemia at various stages in my life, but told I was OK when I was in good control. This just led to confusion, since being symptomatic is really just a sign of poor control, not that you don't have issues with blood sugar control. The book is great for explaining how to normalize your blood sugars, which is important for anyone that has a hard time to doing that eating a conventionally healthy diet.