Want to start combining skincare ingredients for optimal results? The first thing you should know about cocktailing skincare products is that there are ingredients you should use together and others that won't pair well when combined. For instance, retinol products that promote skin cell turnover can be used with moisturizing ingredients like ceramides and hyaluronic acid. However, you shouldn't mix retinol with AHAs or BHAs because they can dry your skin and cause irritation. And remember, if you have any concerns or questions about tailoring your skincare routine for your unique skin type, it's a good idea to consult a beauty expert or dermatologist to help guide you in the right direction.