PCA Skin Intensive Clarity Treatment 0.5% Pure Retinol & Salicylic Acid - 1 oz. Brand new. A retinol particularly made for skin that is prone to breakouts and oil production is PCA Skin Intensive Clarity Treatment. Contains salicylic acid, retinol, and niacinamide in its formulation. Having a time-release delivery system allows for better effects by allowing active substances to penetrate the body more deeply. Apply salicylic acid on your acne-prone skin to treat it actively while promoting long-term clear skin.