What is the best C serum on the market?

The best C serums on the market are those that contain high concentrations of vitamin C. Look for serums with ingredients like ascorbic acid, sodium ascorbyl phosphate, and magnesium ascorbyl phosphate. These ingredients help to protect the skin from free radical damage, reduce wrinkles, and improve overall skin tone. Additionally, look for C serums that are specifically designed for your skin type. For example, if you have oily skin, look for a lighter, oil-free serum.