Ordering TNS with other products
Starting TNS Advanced Serum today after many years on ZO GFS. Google is giving me conflicting answers about the order of things. Can the skincare experts weigh-in please? :)
AM- does it go BEFORE Skinceuticals C E ferulic and P-tiox serum, or after?
PM- does it go on BEFORE Tret or after?
Thank you!