Actress, Gabrielle Union is no stranger to posting makeup-free selfies on Instagram. <br />But according to Allure, she stepped it up a notch this week, by adding a retainer to her fresh-faced picture. <br />Allure writer Marci Robin explained how she felt about Gabrielle's latest selfie, which was posted in her stories: "Putting a retainer back in your mouth after months or years is legit agony, which is why I have the utmost respect for Gabrielle Union's latest selfie."<br />Union admitted through her caption "My teeth are moving. I have to wear my retainer. " <br />If her selfie motivates you to dust off your old retainer, orthodontist Gabrielle Ollins warns users not to boil it, because it will warp it's shape. Instead clean it. <br />She explains, "If you use a retainer or aligners, you can buy over-the-counter cleansing tablets to help keep them germ-free."
