Our Vitamin C Serum is of the highest quality CSerums on the market, and we put it up against other popular brands like Obagiand Perricone. In fact, many of our customers have left reviews stating theylike our C Serum over both Obagi and Perricone. Of course, because everyone'sskin is different some brands may work better for some people than others.Also, our serums are created in a state-of-the-art, FDA-certified facility,with years of testing and research to ensure our products are potent and madefrom extremely, high quality natural ingredients.