If you’re on Facebook, there’s a good chance that — between friends trying to sell you LuLaRoe leggings and whatever it is that Rodan + Fields is — you’re also seeing regular posts about essential oils and their various purported uses, from making you or your home smell nice to somehow miraculously (but not actually) curing diseases. Regardless of the pitch, the underlying message is the same thing: Buy, buy, buy. And these smelly oils are now a big business.. [More]