OBAGI MEDICAL ELASTIDERM FACIAL SERUM Elastin is a protein in the skin and a component of the dermis that is critical for healthy, youthful-looking skin. GUARANTEED brand new, absolutely authentic OBAGI MEDICAL skincare and fully sealed Please see my love notes and feedback from over 11 years selling luxury products on Poshmark to over 715k followers 🎉HOST PICK BEST IN BEAUTY🎉 Full size. As we age, we lose and damage elastin, an essential protein responsible for skin’s elasticity and ability to keep its bounce. The natural depletion of elastin is accelerated by sun exposure, resulting in the appearance of sagging and crepiness as well as the loss of firmness in the skin. Powered by patented and proprietary Bi-Mineral Contour Complex™, ELASTIderm Facial Serum is specifically designed to promote the three necessary stages of developing healthy, functional elastin. No expiration date on OBAGI products OBAGI CODE: 11A1B stamped on bottle and bottom of box above UPC code