Facial serums are like a daily vitamin for your skin. They are a concentrated boost of active ingredients that are going to supercharge your results. My favorite thing about serums is that you can tailor them to your personal concerns. This is the correction step in your regimen and it is also the most important step for seeing a difference and change in your skin. People often think that they can only use one facial serum, but the truth is that you can use as many as you would like. The trick is to layer them thinnest to thickest. I like to layer two in the morning and two in the evening to maximize my results.