My wife is a Type-1 diabetic and I'm fairly confident that there's no such thing as a "zero carb" diet. She's had several endocrinologists tell her that she needs to eat carbohydrates. This is definitely something we need to survive! More importantly, there are naturally occurring carbohydrates in most unprocessed foods (greens, vegetables, beans, etc). Obviously "refined carbohydrates" are different — that's the sugary stuff you find in pop but also stuff like pasta and white rice. Basically the goal should be to avoid overly processed foods, not all carbohydrates.