@nujayat0, this is a basic question, and if you want to sell things on eBay, you need to learn how to find answers like this one for yourself. You can 't rely on asking questions like this online, you need to look up the eBay policy and find the answers for yourself.
As @downunder-61 said, restricted items are described in this policy. As long as you don't see cinnamon oil listed here, then you can sell it.
I suggest you to, briefly check about the Verified Rights Owner (VeRo) program, which is located at the bottom of the eBay page under About eBay category, then you can easily found the best solution for your question.
