Tata Harper Bio-Barrier Serum is an anti-aging facial serum for sensitive skin. An incredibly silky all-in-one anti-aging serum: smoothes, firms and illuminates the skin to restore a healthy and luminous appearance. This ultra-gentle repairing serum is perfect for reactive, stressed, sensitive or dry skin. Bio-Barrier Serum by Tata Harper It is hypoallergenic, dermatologically tested and vegan.