Diet Clarity Keto While non-impact carbs don't affect glucose levels levels, they still contain calories (except fiber, which isn't digestible). Someone that eats lots of non-impact, carb-containing foods still is getting all the calories of equivalent involving regular carbohydrates! This fact is never highlighted in advertising for non-impact carb foods. Total caloric intake still matters on low-carb diets. Really should body is becoming too many calories, it is need to burn bodyfat.