VIT C MARIGOLD SERUM 1.0FLOZ. Features: 15% stabilized pure vitamin C. Patented technology featuring marigold. Bilayer serum. Clinically tested. Dermatologist tested. Key Ingredients: 15% stabilized L-ascorbic acid - The only clinically tested, active form of pure vitamin C, proven to brighten skin, improve elasticity and combat the 8 signs of aging, including hyperpigmentation + discoloration, appearance of fine lines + wrinkles, loss of firmness + brightness. Xanthophyll - We stabilized pure vitamin C using our patented technology featuring xanthophyll carotenoids, a class of highly polar bioactives found in marigolds. With up to 65 times higher SOAC, xanthophyll shields pure vitamin C from bonding with reactive oxygen in the presence of air and light. Research Results: In a clinical study with over 80 people:. 95% saw visible improvement in skin brightness after only 2 weeks. 97% saw improvement in skin hydration after only 2 weeks.