Leonardo da Vinci painted the Mona Lisa with eggs
![Mona Lisa painted with eggs](https://factmyth.com/wp-content/uploads/2023/03/mona-lisa-with-eggs.jpg)
A study published in Nature Communications suggests that “Old Masters” such as Leonardo da Vinci, Sandro Botticelli, and Rembrandt might have used proteins, particularly egg yolk, in their oil paintings.