Euglycemic ketoacidosis induced by therapeutic fasting in a non-diabetic patient

•Ketoacidosis is a severe metabolic disorder caused by the accretion of ketone bodies.•Therapeutic fasting is a popular practice believed to improve health condition.•This is the first report of euglycemic ketoacidosis caused by fasting in a non-diabetic woman.•Ketoacidosis recovery was achieved after intravenous glucose infusion with no insulin requirement.•Therapeutic fasting needs evaluation of the efficacy-safety balance.