The Costco K-beauty guide 2026 begins with an observation that the Korean beauty community has been sharing for the past 18 months with growing enthusiasm: Costco has quietly become one of the best places in American retail to buy Korean skincare — at pricing that YesStyle, Sephora, and Korean specialty beauty retailers cannot approach. Korean beauty, or K-beauty, is the global skincare phenomenon built around the Korean cosmetic industry's specific approach to skin health: m