The Queen has sent her "warmest good wishes" to all those living with diabetes to mark the 100th anniversary of the first successful insulin treatment.
The 95-year-old head of state, who is patron of Diabetes UK, shared a new message to mark the 100th anniversary of the first successful insulin treatment.
The first person to receive a life-saving insulin injection on 11 January 1922 was Leonard Thompson, a 14-year-old who was dying from type 1 diabetes.
The Queen has now said in a message to the charity that she hopes future scientific discoveries will help the organisation stop the disease harming people.
She said: "On the 100th anniversary of the first successful treatment with insulin, I send my warmest good wishes to all those living with and affected by diabetes.
"This milestone provides an opportunity to celebrate this breakthrough that continues to improve the lives of people living with diabetes around the world.
"I extend my thanks for the ongoing hard work and dedication of the scientific, medical and research communities, who work tirelessly to further advance their understanding of the condition.
Month away from milestone
"As patron of Diabetes UK, I send my greetings to all staff and volunteers, and hope that the discoveries yet to come bring you ever closer to achieving your vision of a world where diabetes can do no harm."
The Queen has been getting back into royal duties after spending Christmas at Windsor Castle with Prince Charles and Camilla, the Duchess of Cornwall.
She is also less than a month away from reaching her Platinum Jubilee milestone, but has been advised by doctors to rest after undergoing preliminary investigations in hospital in October last year.