This Obagi Medical Professional Vitamin C Serum is a powerful solution for a variety of skin issues. With its hydrating, restorative, revitalising, age-defying, and nourishing properties, it is perfect for treating blemishes, dark circles, discolouration, and wrinkles. The serum also includes L-ascorbic acid, which is known for its skin firming, regenerating, and lightening capabilities. This 30ml serum is suitable for all skin types and comes with a set of assessories for easy application. It is a day and night treatment that is perfect for use on the face. The product line is Obagi Professional Skincare, and it is manufactured in the United States. The serum has a period after opening (PAO) of 3 months and comes with a sun protection factor (SPF) of 0.