“…Hypoglycaemia is suggested by Whipple's triad: symptoms of hypoglycaemia, venous glucose <3.0 mmol/L and resolution of symptoms after the plasma glucose concentration is raised. 1 However, the glucose concentration that is diagnostic of hypoglycaemia is poorly defined. Various venous glucose levels ranging from <2.5 to <3.3 mmol/L have been used to define hypoglycaemia in non-diabetic subjects.…”