- - Any contraindication for successful and sustained fasting from a medical perspective at the discretion of the investigator (such as acute illness, severe hypoglycaemia within 90 days prior to screening, a history of recurrent hypoglycaemia, hypoglycaemia unawareness, ketoacidosis within 90 days prior to screening, hyperosmolar hyperglycaemic coma within 90 days prior to screening, subjects performing intense physical labour)