The Birkenstock Natural Skin Care Vitamin C Serum helps to reduce fine lines and wrinkles. Due to its high concentration of a stable form of Vitamin C, the serum offers a progressive protection of the skin against damaging environmental influences, oxidative stress and the resulting impact on the skin. Vitamin C stimulates collagen production of the skin and at the same time balances and brightens the complexion. Suitable for all skin types - as pre-ageing care as well as for mature skin. It is particularly helpful for skin types prone to skin damage caused by sun exposure. Dermatologically tested Free from parabens, silicone, paraffin Cruelty free Suitable for Vegans Recyclable packaging Directions Apply in the morning and evening to cleansed, toned skin on face, neck and chest, and gently pat in. Use your usual skincare products afterwards. Thanks to the handy dropper bottle making dosage easy, this perfume-free serum is ideal for daily use, as an intense nourishing treatment, while traveling or after or prior to sunbathing.