Protecting your skin against free radicals can make all the difference in the appearance of your complexion. These harmful particles cause damage to skin cells leaving the complexion looking dull and uneven. Adding this serum to your routine will promote a more even skin tone and an overall brighter complexion. 10% L-ascorbic acid neutralises free radicals Advanced formula absorbs five times better than other serums Ideal for all skin types including sensitive Start each day with Obagi Professional C Serum 10 to keep your skin looking youthful and feeling smooth.