Excellent post, Calianna. My grandfather graduated from med school (U of Toronto where Banting & Best discovered insulin) in 1920 and knew all about low-carb/keto diets for diabetics (and epileptics). In the early days of insulin availability, patients were NOT told to eat all the carbs they wanted and just "cover" it with insulin. WWI & WWII probably helped to curb sugar intake. As a family physician in the US during the Depression and beyond he helped patients who couldn't afford much insulin to cut their carbs to save on drug costs and promote better health (less loss of extremities to gangrene & vision to retinopathy, and at lower cost).