Shailene Woodley is a well-known organic fiend, and she eats clay. This may be the craziest beauty trend we've heard since oil pulling became popular. And it kind of makes sense. . . . We already know clay can detox impurities from the body, and it's a common ingredient in the skin care department already. So swallowing a spoonful can only mean good things for your digestive system, right? Well, we're going to start with baby steps like a clay face mask or a mud hair wash, and maybe we'll even graduate to clay toothpaste. Shop our favorite clay-based beauty finds below to get in on the trend. (Warning: most of these items are not edible).