Article is paywalled, but anecdotally, last year I inched past that magic A1C reading where the doctor tells you you are Type 2 Diabetic. I switched to a low-carb/high-fat diet ( https://reddit.com/r/keto ) and fairly rapidly lost 30 pounds while eating things like avocados, eggs, cheese, butter, coconut oil and bacon.
Several months of this diet and my A1C has dipped back to almost-normal, not even "pre-diabetic" levels. For me at least, carbs are definitely a killer.
Several months of this diet and my A1C has dipped back to almost-normal, not even "pre-diabetic" levels. For me at least, carbs are definitely a killer.