Refine the appearance of skin with the Dr. Barbara Sturm The Peptide Serum, part of a peptide-powered routine designed to reduce the appearance of fine lines and boost skin elasticity. The facial serum is powered by bio-tech peptides for targeted skin benefits, including smoothing the look of expression lines, protecting against a loss of skin density and visibly plumping. It also delivers a boost of hydration to leave skin looking supple and glowing.