Medicube Deep Vita A Retinol Serum 30ml is a high-concentration, dermatologist-tested anti-aging serum (30ml) designed to combat wrinkles, sagging skin, and dark spots while being gentle enough for sensitive skin. It uses a 7-layer encapsulation technology with 4th-gen retinoids to increase skin collagen by 158%, improving texture and firmness without causing significant dryness.