When you flip over your moisturizer and squint at the ingredients list like you’re trying to read the fine print of a sketchy lease agreement, chances are you’ve seen sclerotium gum hanging out near the bottom. It sounds like something that escaped from a high school biology textbook, but no. It’s in your skincare, and it’s probably doing more heavy lifting than you think. From Mushrooms to Moisturizer At its core, sclerotium gum is a polysaccharide, which is a big, science-y word for “a chain of sugar molecules that like to stick together.” Unlike some ingredients that are whipped up in a lab