Discover Bio-Performance Skin Filler Serum, the innovative day and night face serum with hyaluronic acid from Shiseido. In one day, the skin appears younger and more voluminous.* The MolecuShift Technology in two phases is inspired by aesthetic medicine procedures and comes with two inseparable serums; one for night and one for day: Phase 1. Infill Serum - Night Serum: The high molecular weight hyaluronic acid compacted deeply penetrates** the skin during the night hours. Phase 2. Full Expansion Serum - Day Serum: The high molecular weight hyaluronic acid compacted is re-expanded to its original size, lifting the skin from within for an immediate volumizing effect. Enhances the volume and elasticity of the skin. Dermatologically tested product. Technology approved by the Italian Society of Aesthetic Medicine.