REVIVA - Dual Source Vitamin C Serum - 1 fl. oz. (29.5 ml)DESCRIPTION Helps repair environmental skin damage. Dual Source Vitamin C helps promote collagen synthesis. Reduces appearance of dark age spots. Our new Dual Source Vitamin C Serum is more than simply a double dose of C. It is two separate C extracts combined into one potent concentrate. Its also a gentle, effective skin brightener that reduces the appearance of dark age spots. This dual source Serum also helps promote collagen synthesis and corrects