On our CodyCross answers based website we have the solution for William, chemist who discovered insulin in 1921. CodyCross game includes different missions and events which update daily so you can earn tokens that are mostly needed to help with answers for challenging clues. Now let's focus on the answer you need for William, chemist who discovered insulin in 1921 by scrolling down which is part of CodyCross The 1920s Group Puzzle 15.