IT Cosmetics Bye Bye Lines Concentrated Derma Serum helps visibly plump skin and smooth lines! This cosmetoclinically tested, dermatologist-approved serum is formulated with 1.5% hyaluronic acid for lasting hydration. Plus, with a blend of peptide and vitamin B5, it also helps give skin a supple feel. Developed with plastic surgeons and dermatologists, this hyaluronic acid serum is suitable for all skin types—even the most sensitive skin. Visibly more plump and smoother skin is here!