Reveal ultimate radiance with the C15 Super Booster (20ml) from Paula's Choice. Powered by 15% vitamin C (which is formulated at a skin-friendly pH range of 3.1-3.5), this concentrated serum works to brighten your complexion while being boosted by ergothioneine, a powerhouse antioxidant that improves uneven skin tone. What's more, it's also enriched with potent ingredients such as vitamin E and ferulic acid, as well as skin-smoothing peptides, to defend against pigmentation and dark spots. This fast-acting formula boosts glow in just 15 minutes for immediate results. Vitamin C visibly brightens skin. Feather-light, liquid formula absorbs quickly. Use alone or add to your moisturiser or serum. The 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. All the benefits of the Paula's Choice best-selling C15 Super Booster formulated to reduce any potential irritation with faster, enhanced results. Diminishes visible signs of ageing for brighter, smoother skin with a blend of 15% stabilised vitamin C (l-ascorbic acid) at a pH range of 3.1-3.5 , potent antioxidants including ferulic acid, ergothioneine, vitamin E and skin-smoothing peptides. You'll see dramatically younger-looking and more radiant skin day after day.