Dull skin Brown spots Anti-Ageing: Paula's Choice C5 Super Boost Moisturiser All-day hydration meets the anti-ageing benefits of 5% vitamin C for firmer, more radiant skin in one multi-active step. Boost your skin with the superhero that is vitamin C. This lightweight moisturiser super-boosts hydration, tone and radiance with a blend of powerful ingredients. First, 5% stabilised vitamin C visibly improves dullness and promotes firmness by fighting free-radical damage. Then, hexapeptide-5, lipids and polyglutamic acid strengthen the moisture barrier for lasting hydration over time.