The Good C Vitamin C Serum (30 ml)Dr. Barbara Sturms THE GOOD C VITAMIN C SERUM deploys her proprietary formulation of Vitamin C in three skin friendly forms. The serum contains the optimal concentration of 5% Vitamin C in a stable form that is easily absorbed, safe and gentle on the skin. THE GOOD C VITAMIN C SERUM has an active ingredient complex that includes oil soluble Vitamin C THD, stabilized, synthetic Vitamin C in glucosidic form and an extract from Kakadu Plum, a fruit that