Paula's Choice C25 Super Booster is formulated with a silky formula optimized for controlled delivery into the skin to address where dullness and loss of moisture are most prevalent. This powerful booster features high-strength 25% ascorbic acid (vitamin C) with a time-release delivery system that quickly helps to fade persistent brown spots, red marks, and wrinkles. With regular use, this powerful formula works to visibly improve uneven skin tone and soften the appearance of even the most stubborn dull and rough surface texture.Key Ingredients:Vitamin C: delivers potent brightening benefits and counteracts dullnessKey Benefits:Visibly diminishes dark spots, discoloration, and uneven skin toneDelivers impressive skin-smoothing and brightening resultsImparts hydration and helps improve signs of aging