How long does sunscreen last before it expires?
Live Science: Rigoberto Advincula, professor of macromolecular science and engineering, explained some of the ingredients in sunscreen and which of them tends to break down first.
![](https://dailymedia.case.edu/wp-content/uploads/2016/06/18154055/Rigoberto-Advincula.jpg)
How long does sunscreen last before it expires?
Live Science: Rigoberto Advincula, professor of macromolecular science and engineering, explained some of the ingredients in sunscreen and which of them tends to break down first.