Renew Serum is a retinaldehyde serum, stronger than Correct. Renew contains .1% Retinaldehyde whereas Correct has .05%. Renew is designed for resilient or conditioned skin types who desire a dramatic restoration of the skin rejuvenation process. The most potent combination of fibroblast stimulators encourages the reversal of the skin aging. Renew restores dermal thickness, remodels scarring from photodamage, increases skin’s nutrient and immune support, restores the epidermal barrier, hydrates, normalizes oil, clears acne and reduces fine lines.