KD Guaranteed (씨케이디 개런티드) is a bio-nutritional derma skincare brand under Chong Kun Dang Healthcare (종근당건강), one of South Korea's premier pharmaceutical conglomerates. Leveraging clinical-grade delivery systems, the brand specializes in high-penetration anti-aging and barrier care, starring ultra-low-molecular 300 Dalton collagen combined with stabilized Retinal and flexible liposome technology.
