Renae Sweeney, DMD on Instagram: "Sodium Lauryl Sulfate (SLS) is not inherently bad but it’s also not necessary in your toothpaste either, it’s just what gives it that foamy/sudsy feeling. Some people won’t ever have any issues or symptoms while others will experience irritation, peeling of the gums or inside of the cheeks and/or apthous ulcers. So what do you do if you experience these symptoms?! Look for a toothpaste and all oral care products that are SLS free. Examples of SLS Free toothpaste