I wasn’t talking about fiber, but the sugars bound to fiber. Its very hard to accurately labele just the bioavailable calories, even if you account for things like fiber.

On the note of genetics, it’s not just about metabolism. People have different abilities to even absorb the same calories. People have food intolerances, different rates at which they move food through the digestive tract, and different intestinal permeability.

This isn’t meant as an excuse to eat junk and not pay attention to your food. But, I actually find more help in paying attention to food quality and listening to how your body interacts with different food. E.g., eat less processed food, be aware that eating fat slows digestion, pay attention to your intolerances, stop eating when full, cut out snacking (again, especially processed foods). If you do this, its very likely you won’t even need to count.