EXO C-SERUM™ pairs eXo³ Exosomes® with three bio-converting forms of vitamin C for a brighter, more even-looking complexion. The formula is designed to help address dullness, dark spots, uneven tone, and the visible effects of photoaging while supporting a firmer-looking glow. It is a targeted treatment for skin that needs radiance and tone support beyond a basic vitamin C serum.