Most truffle oil in the grocery store is synthetic, and honestly, it’s gotten so good, it’s hard to tell the difference between the two. However, there are a few giveaways.  For example, the label on real truffle oils will have actual truffles and not chemicals, aromas, or flavorings. As a result, the real stuff will also have small chunks of truffles.  In addition, authentic truffle oil is pricey. If you find a bottle with a price that seems too good to be true, it’s probably a fake, but the real stuff lasts forever, and a little goes a long way!