Know anything about sunscreen & the word "photostable"!?

Question

What *exactly* does "photostable" mean?! And which sunscreens are photostable??

Answer 1

Photostable means that it doesn't break down in sunlight. ALL sunscreens should be photostable otherwise they're not sunscreen. Medications can be photosensitive which means that they break down with UV light so they are placed in a darker brownish-orange packaging rather than the standard white or clear medication containers.