No, you should avoid moisturizing before self-tanning, as this can affect the way the color absorbs. Plus, many tanning products already contain moisturizing and hydrating ingredients such as vitamin E, hyaluronic acid, shea butter, and various natural oils. The exception to this rule is the annoyingly dry parts of your body, including your ankles, knees, and elbows. Some products recommended applying a minimal amount of oil-free moisturizer to these areas to prevent them from getting too dark or blotchy. However, always check the instructions first!