Essential oils can be an easy way to add a pleasant scent to a room or to make homeopathic remedies at home. But know what you're buying the next time you're perusing the health food aisle. Labels that say "naturally derived" don't mean the oils actually came from plants or flowers; instead, it means the molecular structure of whatever flower or plant they are inspired by is replicated as a synthetic in a lab using the plant's actual DNA structure. In other words, it's artificial. Look for United States Department of Agriculture-certified organic essential oils to be sure you're getting the real thing.