LIKE NEW-only used once! 1 fl oz.-retails for $92 ▪️Fast-acting serum with 3 retinol technologies visibly improves key signs of aging in just 2 weeks. Gentle enough for nightly use. ▪️It's clinically proven: Users in a single-blind study reported visible improvement in the 5 key signs of aging: no Fewer lines and wrinkles, skin that looks firmer, feels smoother, and is more even-toned with a boosted glow (after 4 weeks) ▪️Retinol can be notoriously drying. Murad's Retinol Tri-Active Technology and hydrating hyaluronic acid make it gentle enough to use nightly without sacrificing any of the benefits