His body’s response to being deprived of complex carbs may have pushed more sugar into his blood stream.
I don’t see how, unless I misunderstand how the body works, and I may, I thought when you deprived the body of carbs, your body became Ketone dependent, deriving its energy from ketones extraced from stored fat.
If depriving yourself of sugars would cause blood sugar to spike, then I don’t understand how Diabetics could exist on a low carb diet.