Synergie Skin

Effica-C Serum


This elegant formula is supercharged with triple antioxidants and hero ingredient Ascorbyl Tetraisopalmitate: a stable yet highly penetrative non-acidic form of vitamin C to boost collagen production and neutralise free radical damage.


Due to its broad accessibility to all skin types, Effica C will be replacing SupremaC+ in our introductory kits and Cult Classics as the entry-level vitamin C serum. SupremaC+ will remain a stand-alone product recommended as a 'step up' for more tolerant skin profiles.