Dr. Barbara Sturm Calming Serum, 1.0 oz./ 30 mL DetailsAn effective concentrate that contains an active, plant-based complex of Cardiospermum, Echium and Sunflower to rebalance and calm irritated skin and help reduce redness and burning. The calming serum strengthens the skins natural defenses, minimizing the skins sensitized reaction. Purslane, a key active ingredient used in this range by Dr. Sturm, activates the skins own antioxidant system, calms inflammation and protects sensitive cel.