VITAMIN C 1.0OZ. Benefits: Paraben-free. Fragrance-free. Sulfate-free. Dermatologist-tested. Cruelty-free. Made in the USA. Key Ingredients: Tetrahexyldecyl Ascorbate (THD-Ascorbate): A very stable, oil-soluble Vitamin C ester that has been shown to improve skin brightness and skin pigmentation with continued use. Green Microalgae: Sustainably farmed; helps protect against the effects of blue light. Black Myrobalan: Used in Ayurveda and revered for its purifying and nourishing properties. A powerful antioxidant that protects against free radical damage and has been shown to improve skin's brightness with continued use. Acetyl Zingerone: A super-antioxidant that helps protect against free radical damage. Research Results: In a Consumer Perception Study, after 4 weeks of use:*. A significant number of participants reported that skin looked brighter and revitalized. They said Brightening Booster Vitamin C Serum is hydrating and moisturizing. A significant number of participants said their skin looked firmer, with a reduction in fine lines and wrinkles. A majority of participants reported improved overall appearance of the skin. *Based on a consumer perception study of 30 subjects after 4 weeks of use two times per day, morning and evening, after cleansing.