There will always be errors in calculations in matching insulin to food, so
a smaller insulin load enables you to reduce the errors in insulin dosing.
Not exact matches
To bring things back to Metabolic Flexibility, if you are metabolically inflexible AKA you can not run on fat very well in a fasted state (weight loss resistant) and you can not dispose of a dump truck
load of bagels without going into a coma on the couch (
insulin resistant), you have a very
small window of fat and glucose that you can function in without symptoms — a la
small frequent meals.
Rather, in the face of a diet such as the TWT diet, which carries a very
small glycemic
load, the body's production of glycogen through protein metabolism has a negligible impact on blood sugar (and essentially no adverse impact in
insulin response).
For someone on a low carb diet with a lower
insulin load, the majority of their
insulin demand will be for basal
insulin, with only a
small amount required to cover food.