In Vitro Photostability

Specialized Photostability Testing

We have developed an in vitro spectroscopy method for evaluating the photostability of sunscreens using VITRO-SKIN and a modified solar simulator as a light source. With this configuration we can control both the intensity and the spectral distribution (UVA and UVB) of the light source and study their impact on the photostability of sunscreen products.

The photostability results and protection factors obtained with this system correlate much better with in vivo testing because this modified instrument utilizes a solar simulator light source identical to that used in clinical testing.