Simply put, serums are powerful tools in your perfect skincare routine. Filled with concentrated doses of active ingredients, these elixirs can mitigate a number of issues, from dark spots to wrinkles. Even if you don’t have any specific issues, everyone still needs a general antioxidant serum in the morning to protect from daily aggressors. To save time, don’t try mixing a serum into your moisturizer. This lessens the ability of the serum to absorb effectively. Products should be applied one by one. Not all serums are applied with the same frequency. This varies with the ingredients. Products high in antioxidants are better in the morning because they provide you with additional protection from the environment, and most people don’t use enough sunscreen as is. Yet certain ingredients are best when slathered on at night. For example, retinols are not sun-stable and will degrade if applied in daytime. Bottom line: Read the label instructions carefully.