Nanosome Technology: DS Laboratories formulas feature our proprietary Nanosome Technology. This technology used for encapsulation allows for the continuous release of the active ingredients creating higher efficacy with longer lasting results. How To Use: After facial cleansing, apply 2-4 pumps of Pure Vitamin C serum to dry face, neck, and neckline. Use daily in the morning and/or evening before other skincare products. A patch test is recommended for all users. This is a powerful and concentrated formula so prior to using our Vitamin C Serum apply a small amount on skin 24 hours prior to regular use to be sure that our formula is a good fit for your skin. Dermatologist Formulated: Free of Parabens, Fragrances, BHT, BHA, Nanos and PEGs our formulas are created using science-backed, effective, high-quality ingredients that are suitable for all skin types. Our Pure Vitamin C 35% Perfecting + Brightening Serum is 100% vegan and not tested on animals. Clean and Effective Ingredients: Visibly reduce the signs of ageing with this clean and effective skin care formula. Our Vitamin C anti aging serum contains 35% pure Vitamin C, the highest amount currently on the market. Squalane extracted from organic olives helps to repair the skin barrier creating younger looking skin. Pure Vitamin E works in tandem with the Vitamin C to neutralize free radicals and replenish skin lipids giving you glowing skin. Anti Aging Vitamin C Face Serum: This skin brightening serum plumps and firms skin creating a healthy more even complexion. Brighten dull, tired looking skin while fading the appearance of sunspots, reducing the signs of premature aging and protecting against photoaging damage.