Clinically proven L-ascorbic acid at it's peak concentration of anti-oxidant activity which is quickly absorbed to remove free radicals to prevent skin damage, helping brighten the skin and maintain a youthful appearance. The formation is supported with Ferulic Acid to create this light effective day serum. Start your Radiate Vit C Journey with Radiate 10 and Progress to Radiate 20 when skin becomes used to using ACTIVES. Designed to sit under both Medi+ Replenish and Medi+ Shield 50 moisturisers.