Serums are the workhorses of your skincare routine — and most people are using the wrong one. As a licensed esthetician, I’m breaking down what a serum actually does, when to use it, and which ingredients are non-negotiable for healthy skin. If your skincare isn’t giving results, this step is usually why. Save this for your night routine & tell me your skin type below 👇🏽 LTKBeauty LTKgrwm LTKselfcare