My daughter hasn’t brushed her teeth in two days. That’s because we ran out of the natural kids toothpaste, and so did our local supermarket. The convenient little shelf that featured all my favorite eco-friendly kids toothpaste brands is gone, and none of them are integrated anywhere else. Sure, I can make a special trip to Whole Foods. But for kids toothpaste? I might as well just grin and bear it—pun intended—and buy a tube of the conventional kind. Right? Wrong. Because as I found out, conventional kids toothpaste can be toxic.