I'm sorry, but how is sugar "completely necessary for survival"? Can you point to any studies that back that up? I'm not a nutritionist, but from my layman und

I'm sorry, but how is sugar "completely necessary for survival"? Can you point to any studies that back that up? I'm not a nutritionist, but from my layman understanding, carbohydrates break down to glucose during digestion, so any "good" carb source (oatmeal, beans, peas, etc.) will affect blood sugar levels. But even those carbs aren't necessary for survival. After a period of time, the body (and yes, the brain as well) will adapt to use other sources of energy, such as ketones, which are a fats/lipids by-product. Even then, with no carb intake, glucose can be generated from non-carbs via gluconeogenesis, if needed. Low-carb high-fat diets have been a life-saver for diabetics, helping reduce or eliminate their reliance on insulin, and that's pretty much proof the human body doesn't need sugar for survival.