These products are by far the best skincare products I have ever used. I recently endured 4.5 months of chemotherapy and needed to adjust the use of some of the products during this time on the advice of Peter Dixon. He was so incredibly helpful and suggested I use the C-serum 10% to give my skin a little glow throughout my treatment. The results have been truly amazing to the extent that people have been commenting on how well I look. Believe me you very often don’t feel well during Chemo! I am totally a fan of the C-Serum and will continue using it daily along with the other great products in the Obagi skincare range.