It Really Works: Lactic Acid Serum Testimonials Share on Facebook (open in new window or tab) Tweet on Twitter (open in new window or tab) Pin on Pinterest (open in new window or tab) Share via Email (open in new window or tab) See the real stories & before and afters from Lactic Acid users who saw brighter, more even, and smoother skin after just one week. Shop Shani Darden Skin Care Shani Darden Skin Care Lactic Acid Serum From $32 Add To Bag Lactic Acid Serum Shani Darden Skin Care Retinol Reform® From $32 Add To Bag Retinol Reform® Shani Darden Skin Care Intensive Eye Renewal Cream $69 Add To Bag Intensive Eye Renewal Cream