I'm sorry - this is naive advice. Generalized, this would mean that we shouldn't innovate or develop anything new at all (if what's worked previously is the ONL

I'm sorry - this is naive advice. Generalized, this would mean that we shouldn't innovate or develop anything new at all (if what's worked previously is the ONLY way it should work). Especially, with something related to diet and nutrition, there is an ever evolving need to alter our habits with the way our lifestyles changed. The kind of life your grandmother led is vastly different than the way you do now. Similarly, carbs were great when as a culture we embraced agriculture, started working the fields and were able to secure food supplies for emergencies and the next generation. Now, farm productivities have shot up, fewer of us are working directly on growing food and there's abundance of food choices all around. We no longer need the easy glucose that we needed earlier. So, it is important that we change our dietary choices if we want to lead healthier lives.