This concentrated serum contains 20% Vitamin C so is fantastic at delivering all of the skin benefits of this ingredient - brightening the skin, reducing wrinkles and fine lines, fading pigmentation and providing antioxidant protection. During a user trial, 97% agreed their skin looks revitalised after 4 weeks of daily use. What makes this formula even more interesting is that it is suitable for sensitive skin, with 50% of the panel it was tested on being sensitive skinned.