Understanding the principles of insulin use in type 1 and type 2 diabetes management.

The year 2021 marks 100 years since the Nobel Prize-winning discovery of insulin as a medical treatment for diabetes mellitus. Its discovery changed type 1 diabetes from a terminal condition with a short life expectancy to one of long-term management, with patients now often living long and fulfilling lives. Today, much of the advice, support and prescribing of insulin is undertaken by nurses, including general nurses and those specialising in diabetes.