Best-selling 15% Vitamin C-boosted. This new & improved concentrated booster with 15% pure vitamin C is clinically proven to brighten skin while improving the appearance of wrinkles and fine lines with minimised irritation. Fast-acting formula boosts glow in just 15 minutes for immediate results. New gentle formula, immediate results. Vitamin C visibly brightens skin. Feather-light, liquid formula absorbs quickly. Use alone or add to your moisturiser or serum. Why is it different? New enhanced formula delivers benefits of 15% vitamin C with minimised irritation, while harnessing new technology to target dullness and uneven tone for a firmer, more radiant complexion. Ferulic Acid defends against discolourations and boosts the stability of vitamin C. Now formulated with Ergothioneine, a powerhouse antioxidant that improves uneven tone & boosts vitamin C efficacy for advanced results. Formulated to be gentler than ever-100% of testers agree it feels non-irritating on skin. Why we reformul