Jersey Beauty Company The dialogue around Vitamin C often focuses on the amount of Vitamin C in the product – but brightening efficacy isn’t all about the level. There are two main factors that make Vitamin C products effective: the Vitamin C needs to be highly stable (so that it remains active and efficient), and it needs to be bioavailable (able to get actives into the skin). BioLumin-C formulas – including BioLumin-C Gel Moisturiser – represent a new paradigm in Vitamin C efficacy. These formulas are extremely stable and highly bioavailable, giving outstanding brightening results.