I was curious about this so went searching today...
L'Oreal dropped the case apparently.
From Reddit:
Drunk Elephant has responded to L'Oreal (Skinceuticals) complaint, denying any infringement, arguing that the patent is invalid due to not meeting requirements of patentability, invalid due to prior art, invalid due to lack of written claim description, and indefiniteness Fairly standard language in a response. The most interesting part of Drunk Elephant's response is this: