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.