RCW (others welcome as well) - PSF questions
I have been using PSF vitamin c serum in the am (over benzaclin and under moisturizer) and the bio copper serum in the eve over Renova (i also layer clindamycin lotion on top in the evening). I have the AHA serum as well as the Berry Antioxidant serum as both looked interesting. Given my current regimen how would you recommend using them? I don't wan to encounter any ill effects by combining products badly.