An important discovery, invention or advancement in knowledge

An important discovery on pharmacology was the one who did Frederick Grant Banting  in 1921 with Charles Blest, they discovered the insulin hormon. They won the Nobel Prize in 1923.

This discover brings a lot of benefits for the people with diabetes, because before they discovered the insulin hormon the treatment for people with diabetes was basically make them dieting, especifically the " starving diet", really strict diets, wasn´t uncommon for those patients with diabetes die literally of hunger.
https://elefectorayleigh.cl/2014/05/09/la-nada-dulce-historia-del-descubrimiento-de-la-insulina/
 consequenses