Hello Eves, 40 years of experience 10 patents +200 studies published in prestigious medical journals We can definitely say that SkinCeuceuticals is a precursor when it comes to antioxidants, aren't you?! Vitamin C is a highly effective antioxidant in skin care. But there are so many different types: “Which one suits my skin best?” you're probably wondering! No worries! SkinCeutics has a vitamin C serum for every skin type. The Silymarin CF serum is perfect for oily skin with a tendency to impurities, the C E Ferulic serum is also ideal for normal to dry skin, and finally, our Phloretin CF is the solution for skin conditions with pigmentation, such as age spots and sun damage. Once you've found the right serum for your skin, it's still important to know how to use the serum. SkinCeuticals' vitamin C serums belong to the 'prevent' category and are the first step after cleansing the skin in the morning. We're super curious about what you think of our antioxidants as the start of your morning ritual, and can't wait to read your review as co-precursor. (Vitamin) C you later SkinCeutics