What it is: A balancing serum that helps improve the appearance of blemishes, marks, blackheads and shine while providing effective anti-aging action. What it does: This serum includes prebiotics essential for keeping imperfections at bay and advanced sebum-regulating ingredients. Oily skin is especially prone to sagginess. The formula is complete with rejuvenating agents, including a retinol-like ingredient which helps reduce the appearance of premature aging and lack of firmness.. How to use: Cleanse and tone your skin. Massage the concentrate gently into your face, neck and décolleté until it is completely absorbed. Finish with your cream for preference. 1 oz. Made in Spain