Nutrition scientists are saying that their attempt to demystify food by dividing it into carbs, protein and fat as macronutrients has only led to more confusion. The only ones to benefit have been the big food companies. There is a multi-billion-dollar weight-loss industry preying on a simple fact—fear and confusion about what to eat. Let’s look at two of the simplest and time-tested tools we can use whenever we are in doubt about feeding ourselves right.