…drates. It’s not fibre. It’s not ketones. The only currency the body really cares about is insulin. If you want to lose weight, reduce insulin. If you want to gain weight, increase insulin. That’s the common currency. Since our body only cares about insulin, we better learn the insulin effect of foods.
…or counting carbohydrates. You body certainly responds to carbohydrates, but it doesn’t count them. Some carbohydrates will stimulate insulin and others will not. That means that all carbohydrates are not equal. Highly processed carbohydrates are very stimulating to glucose and insulin. Minimally processed carbohydrates have very little glucose or insulin effect.
Since our body is not likely to learn the language of ‘calories’, we need to learn the language of ‘insulin’, by translating foods into insulin effect instead of calories. You can estimate a foods insulin effect based on net carbs (carbs- fibre) + 0.54 protein. Even then, this formula only accounts for about 50% of the known insulin effect, so there is still much more we need to learn. The least insulinogenic diet is low carb, high fibre, moderate protein, high in natural fats. In other words, a real food, LCHF diet.