It's interesting how accepting of the status quo people (in general) seem to be.
Glycaemic Load is currently measured as the amount of carbohydrate in grammes (m) multiplied by the Glycaemic index (v). Newtons second law of motion says that momentum is proportional to m X v.
What is being attempted to be calculated however is the effect on blood glucose of a food of course, which is actually the transference of energy, the relevant equation being kinetic energy as half the amount of carbohydrate multiplied by the glycaemic index squared?
BMI has been questioned recently too. Currently it is measured as bodyweight divided by height squared, but bodyweight divided by height cubed would be more appropriate, to give a measure of weight per unit volume instead of per unit area?