We've got your online savings for October 2019, with 1 new Ampersand Promo Codes and the best Coupons to save a bundle at ampersandskin.com. Multi-action Serums with Targeted Results - Ampersand. Developed with dermatologists and world renowned formulators, these six transformative serums are all powered naturally sourced ingredients. MULTI-ACTION SERUMS THAT DELIVER TARGETED RESULTS. Developed with dermatologists and world renowned formulators, these six transformative serums are all powered by a proprietary blend of naturally sourced ingredients, known as Essential Skin Defense (ESD™). ESSENTIAL SKIN DEFENSE (ESD™) - This advanced complex uses fermentation technology to allow maximum absorption of ingredients, while protecting the skin's natural barrier function. Each individual serum also contains a unique set of ingredients formulated to target specific skin concerns. Select a single solution for your skin, or layer multiple serums for accelerated results.