A decade ago most doctors held the same contempt for keto. An Atkins-like diet that worked as well - and often better - than antiepileptic drugs?

The low-carbohydrate food movement gave birth to such diets as the Atkins, Paleo and Keto, which advised swapping foods like bread, pasta and potatoes for vegetables, fish and meat.

This complex reaction is characterized by a keto-enol tautomerism equilibrium and ester exchange reaction.