Imagine wearing the same outfit for years and years. You never would, right? So why do the same with your skin care? Just as we swap out things in our closets for better-made pieces and the latest trends, the same should happen with your medicine cabinet. “To some degree, the skin sort of gets used to a routine,” says Charlotte, NC dermatologist Gilly Munavalli, MD. “I think mixing it up is always good. These new ingredients have different mechanisms of how they work and might stimulate different pathways in the skin that allow for more skin turnover or improved barrier function of the skin. It’s always good for your skin to not get used to one specific routine.”