For 2021 to celebrate the 100th Anniversary of the Discovery of Insulin, the Royal Mint released a Limited Issue Insulin 50p Fifty Pence Silver Proof Coin struck in solid .925 Sterling Silver.

The reverse, designed by Iris De La Torre features an interpretation of the structure of insulin along with its molecular formula while the obverse has the stunning portrait of Her Majesty Queen Elizabeth II by Jody Clark.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.

• Limited Mintage Presentation of 2,161 Worldwide
• Struck to Royal Mint's Proof Quality in Solid .925 Sterling Silver
• Celebrating the 100th Anniversary of the Discovery of Insulin
• Honouring the Incredible Legacy of John Macleod, Sir Frederick Banting, Charles Best and James Collip
• The Fifth Coin in the Popular Innovation in Science Coin Series
• Produced in Collaboration with the University of Aberdeen
• Royal Mint Boxed with Certificate of Authenticity