Medicube Triple Collagen Serum 4.0 55ml is a Korean anti-aging serum formulated with a triple collagen complex — nano-collagen, hydrolyzed collagen, and collagen amino acids — to firm skin, reduce fine lines, improve elasticity, and restore youthful skin density. The 4.0 version delivers an upgraded formula with enhanced penetration technology for faster and more visible firming results. Currently priced at ৳2,100 at koreanshopbd.com. Buy online from koreanshopbd.com, COD available!