Both humans and animals generate energy by tricarboxylic acid (TCA) cycle from carbohydrates, fats and proteins. Among them, carbohydrates axis seemed to be the main route for energy production so far. In the case of diabetes, however, the restraint of glucose metabolism would be beneficial by low carbohydrate diet (LCD) or newly-introduced oral hyperglycemic agent (OHA), Sodium-Glucose Cotransporter 2 Inhibitors (SGLT2i). Author and colleagues have developed LCD movement by Japan LCD promotion association (JLCDPA). Our lectures include useful and practical 3 LCD meals, which are petite-LCD, standard-LCD and super-LCD with carbohydrate content ratio as 40%, 26% and 12%, respectively.