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WHAT IT IS Auteur's Definitive Retinol Serum is an overnight serum targeting uneven skin tone and hyperpigmentation that refines texture, brightens skin, and softens lines by increasing cellular turnover. 1 oz. Made in Germany. WHAT IT DOES Reinvigorate the skin's natural functions with a combination of encapsulated retinol (vitamin A) and bakuchiol that stimulate cellular turnover, reduce the appearance of hyperpigmentation and lines, and restore radiance. Lactic and glycolic acids gently resur