There are no FDA approved essential oils, but there are FDA compliant ones. The FDA regulates labeling to ensure no misleading claims are made. If an oil is labeled as providing therapeutic benefits such as a cure, mitigation, or treatment, then it needs to be classified as a drug. That process is long, detailed, and subject to different regulations as food or cosmetics. As such, many essential oils are compliant in that they are careful about the claims made on their labels and advertising.