What it is: A liquid serum formulated by Dr. Yannis Alexandrides to enhance, rebalance and brighten skin.Who it's for: Ideal for all skin types, including sensitive.What it does: The Vitamin-C Brightening Booster serum is formulated to help supercharge dull, tired skin and banish age spots and redness. Formulated for sensitive skin, this booster reduces the look of pigmentation while hydrating the skin with added hyaluronic acid. The result, a smooth and brighter complexion.Key ingredients: - Vitamin C: a potent antioxidant that protects the skin from environmental aggressors, brightens skin, stimulates collagen production and plumps fine lines and wrinkles- Diamond particles: gently exfoliates the skin to ensure deeper delivery of the active ingredients- Hyaluronic acid: deeply hydrates and locks in moisture for a plump, youthful and dewy complexion- Licorice root: brightens and evens skin tone and reduces rednessHow to use: Shake well before use. Mix one to two drops into the palm of your hand with your favorite moisturizer or apply directly to skin after cleansing with 111SKIN Vitamin-C Brightening Cleanser (sold separately). Avoid direct contact with eyes. If product gets into eyes, rinse well with water immediately. Do not store in direct sunlight. In case of any irritation, discontinue use. 0.67 oz. Paraben-free; sulfate-free; silicone-free; paraffin-free